let n be Element of NAT ; :: thesis: for C being Simple_closed_curve
for i1, i2, j, k being Element of NAT st 1 < i2 & i2 <= i1 & i1 < len (Gauge C,n) & 1 <= j & j <= k & k <= width (Gauge C,n) & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Upper_Seq C,n)) = {((Gauge C,n) * i1,j)} & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Lower_Seq C,n)) = {((Gauge C,n) * i2,k)} holds
(LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) meets Upper_Arc C
let C be Simple_closed_curve; :: thesis: for i1, i2, j, k being Element of NAT st 1 < i2 & i2 <= i1 & i1 < len (Gauge C,n) & 1 <= j & j <= k & k <= width (Gauge C,n) & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Upper_Seq C,n)) = {((Gauge C,n) * i1,j)} & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Lower_Seq C,n)) = {((Gauge C,n) * i2,k)} holds
(LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) meets Upper_Arc C
let i1, i2, j, k be Element of NAT ; :: thesis: ( 1 < i2 & i2 <= i1 & i1 < len (Gauge C,n) & 1 <= j & j <= k & k <= width (Gauge C,n) & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Upper_Seq C,n)) = {((Gauge C,n) * i1,j)} & ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Lower_Seq C,n)) = {((Gauge C,n) * i2,k)} implies (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) meets Upper_Arc C )
set G = Gauge C,n;
set pio = LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k);
set poz = LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k);
set US = Upper_Seq C,n;
set LS = Lower_Seq C,n;
assume that
A1: 1 < i2 and
A2: i2 <= i1 and
A3: i1 < len (Gauge C,n) and
A4: 1 <= j and
A5: j <= k and
A6: k <= width (Gauge C,n) and
A7: ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Upper_Seq C,n)) = {((Gauge C,n) * i1,j)} and
A8: ((LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))) /\ (L~ (Lower_Seq C,n)) = {((Gauge C,n) * i2,k)} and
A9: (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) misses Upper_Arc C ; :: thesis: contradiction
set UA = Upper_Arc C;
set Wmin = W-min (L~ (Cage C,n));
set Emax = E-max (L~ (Cage C,n));
set Wbo = W-bound (L~ (Cage C,n));
set Ebo = E-bound (L~ (Cage C,n));
set Gik = (Gauge C,n) * i2,k;
set Gij = (Gauge C,n) * i1,j;
set Gi1k = (Gauge C,n) * i1,k;
A10: 1 < i1 by A1, A2, XXREAL_0:2;
A11: i2 < len (Gauge C,n) by A2, A3, XXREAL_0:2;
A12: L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> = (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) \/ (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) by TOPREAL3:23;
(Gauge C,n) * i2,k in {((Gauge C,n) * i2,k)} by TARSKI:def 1;
then A13: (Gauge C,n) * i2,k in L~ (Lower_Seq C,n) by A8, XBOOLE_0:def 4;
(Gauge C,n) * i1,j in {((Gauge C,n) * i1,j)} by TARSKI:def 1;
then A14: (Gauge C,n) * i1,j in L~ (Upper_Seq C,n) by A7, XBOOLE_0:def 4;
A15: j <= width (Gauge C,n) by A5, A6, XXREAL_0:2;
A16: 1 <= k by A4, A5, XXREAL_0:2;
A17: [i1,j] in Indices (Gauge C,n) by A3, A4, A10, A15, MATRIX_1:37;
A18: [i2,k] in Indices (Gauge C,n) by A1, A6, A11, A16, MATRIX_1:37;
A19: [i1,k] in Indices (Gauge C,n) by A3, A6, A10, A16, MATRIX_1:37;
set go = R_Cut (Upper_Seq C,n),((Gauge C,n) * i1,j);
set do = L_Cut (Lower_Seq C,n),((Gauge C,n) * i2,k);
A20: len (Gauge C,n) = width (Gauge C,n) by JORDAN8:def 1;
A21: len (Upper_Seq C,n) >= 3 by JORDAN1E:19;
then len (Upper_Seq C,n) >= 1 by XXREAL_0:2;
then 1 in dom (Upper_Seq C,n) by FINSEQ_3:27;
then A22: (Upper_Seq C,n) . 1 = (Upper_Seq C,n) /. 1 by PARTFUN1:def 8
.= W-min (L~ (Cage C,n)) by JORDAN1F:5 ;
A23: (W-min (L~ (Cage C,n))) `1 = W-bound (L~ (Cage C,n)) by EUCLID:56
.= ((Gauge C,n) * 1,k) `1 by A6, A16, A20, JORDAN1A:94 ;
len (Gauge C,n) >= 4 by JORDAN8:13;
then A24: len (Gauge C,n) >= 1 by XXREAL_0:2;
then A25: [1,k] in Indices (Gauge C,n) by A6, A16, MATRIX_1:37;
then A26: (Gauge C,n) * i1,j <> (Upper_Seq C,n) . 1 by A1, A2, A17, A22, A23, JORDAN1G:7;
then reconsider go = R_Cut (Upper_Seq C,n),((Gauge C,n) * i1,j) as being_S-Seq FinSequence of (TOP-REAL 2) by A14, JORDAN3:70;
A27: len (Lower_Seq C,n) >= 1 + 2 by JORDAN1E:19;
then A28: len (Lower_Seq C,n) >= 1 by XXREAL_0:2;
then A29: 1 in dom (Lower_Seq C,n) by FINSEQ_3:27;
len (Lower_Seq C,n) in dom (Lower_Seq C,n) by A28, FINSEQ_3:27;
then A30: (Lower_Seq C,n) . (len (Lower_Seq C,n)) = (Lower_Seq C,n) /. (len (Lower_Seq C,n)) by PARTFUN1:def 8
.= W-min (L~ (Cage C,n)) by JORDAN1F:8 ;
(W-min (L~ (Cage C,n))) `1 = W-bound (L~ (Cage C,n)) by EUCLID:56
.= ((Gauge C,n) * 1,k) `1 by A6, A16, A20, JORDAN1A:94 ;
then A31: (Gauge C,n) * i2,k <> (Lower_Seq C,n) . (len (Lower_Seq C,n)) by A1, A18, A25, A30, JORDAN1G:7;
then reconsider do = L_Cut (Lower_Seq C,n),((Gauge C,n) * i2,k) as being_S-Seq FinSequence of (TOP-REAL 2) by A13, JORDAN3:69;
A32: [(len (Gauge C,n)),k] in Indices (Gauge C,n) by A6, A16, A24, MATRIX_1:37;
A33: (Lower_Seq C,n) . 1 = (Lower_Seq C,n) /. 1 by A29, PARTFUN1:def 8
.= E-max (L~ (Cage C,n)) by JORDAN1F:6 ;
(E-max (L~ (Cage C,n))) `1 = E-bound (L~ (Cage C,n)) by EUCLID:56
.= ((Gauge C,n) * (len (Gauge C,n)),k) `1 by A6, A16, A20, JORDAN1A:92 ;
then A34: (Gauge C,n) * i2,k <> (Lower_Seq C,n) . 1 by A2, A3, A18, A32, A33, JORDAN1G:7;
A35: len go >= 1 + 1 by TOPREAL1:def 10;
A36: (Gauge C,n) * i1,j in rng (Upper_Seq C,n) by A3, A4, A10, A14, A15, JORDAN1G:4, JORDAN1J:40;
then A37: go is_sequence_on Gauge C,n by JORDAN1G:4, JORDAN1J:38;
A38: len do >= 1 + 1 by TOPREAL1:def 10;
A39: (Gauge C,n) * i2,k in rng (Lower_Seq C,n) by A1, A6, A11, A13, A16, JORDAN1G:5, JORDAN1J:40;
then A40: do is_sequence_on Gauge C,n by JORDAN1G:5, JORDAN1J:39;
reconsider go = go as non constant being_S-Seq s.c.c. FinSequence of (TOP-REAL 2) by A35, A37, JGRAPH_1:16, JORDAN8:8;
reconsider do = do as non constant being_S-Seq s.c.c. FinSequence of (TOP-REAL 2) by A38, A40, JGRAPH_1:16, JORDAN8:8;
A41: len go > 1 by A35, NAT_1:13;
then A42: len go in dom go by FINSEQ_3:27;
then A43: go /. (len go) = go . (len go) by PARTFUN1:def 8
.= (Gauge C,n) * i1,j by A14, JORDAN3:59 ;
len do >= 1 by A38, XXREAL_0:2;
then 1 in dom do by FINSEQ_3:27;
then A44: do /. 1 = do . 1 by PARTFUN1:def 8
.= (Gauge C,n) * i2,k by A13, JORDAN3:58 ;
reconsider m = (len go) - 1 as Element of NAT by A42, FINSEQ_3:28;
A45: m + 1 = len go ;
then A46: (len go) -' 1 = m by NAT_D:34;
A47: LSeg go,m c= L~ go by TOPREAL3:26;
A48: L~ go c= L~ (Upper_Seq C,n) by A14, JORDAN3:76;
then LSeg go,m c= L~ (Upper_Seq C,n) by A47, XBOOLE_1:1;
then A49: (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) c= {((Gauge C,n) * i1,j)} by A7, A12, XBOOLE_1:26;
m >= 1 by A35, XREAL_1:21;
then A50: LSeg go,m = LSeg (go /. m),((Gauge C,n) * i1,j) by A43, A45, TOPREAL1:def 5;
{((Gauge C,n) * i1,j)} c= (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {((Gauge C,n) * i1,j)} or x in (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) )
assume x in {((Gauge C,n) * i1,j)} ; :: thesis: x in (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>)
then A51: x = (Gauge C,n) * i1,j by TARSKI:def 1;
A52: (Gauge C,n) * i1,j in LSeg go,m by A50, RLTOPSP1:69;
(Gauge C,n) * i1,j in LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) by RLTOPSP1:69;
then (Gauge C,n) * i1,j in (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) by XBOOLE_0:def 3;
then (Gauge C,n) * i1,j in L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> by SPRECT_1:10;
hence x in (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) by A51, A52, XBOOLE_0:def 4; :: thesis: verum
end;
then A53: (LSeg go,m) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) = {((Gauge C,n) * i1,j)} by A49, XBOOLE_0:def 10;
A54: LSeg do,1 c= L~ do by TOPREAL3:26;
A55: L~ do c= L~ (Lower_Seq C,n) by A13, JORDAN3:77;
then LSeg do,1 c= L~ (Lower_Seq C,n) by A54, XBOOLE_1:1;
then A56: (LSeg do,1) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) c= {((Gauge C,n) * i2,k)} by A8, A12, XBOOLE_1:26;
A57: LSeg do,1 = LSeg ((Gauge C,n) * i2,k),(do /. (1 + 1)) by A38, A44, TOPREAL1:def 5;
{((Gauge C,n) * i2,k)} c= (LSeg do,1) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {((Gauge C,n) * i2,k)} or x in (LSeg do,1) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) )
assume x in {((Gauge C,n) * i2,k)} ; :: thesis: x in (LSeg do,1) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>)
then A58: x = (Gauge C,n) * i2,k by TARSKI:def 1;
A59: (Gauge C,n) * i2,k in LSeg do,1 by A57, RLTOPSP1:69;
(Gauge C,n) * i2,k in LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) by RLTOPSP1:69;
then (Gauge C,n) * i2,k in (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) by XBOOLE_0:def 3;
then (Gauge C,n) * i2,k in L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> by SPRECT_1:10;
hence x in (LSeg do,1) /\ (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) by A58, A59, XBOOLE_0:def 4; :: thesis: verum
end;
then A60: (L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) /\ (LSeg do,1) = {((Gauge C,n) * i2,k)} by A56, XBOOLE_0:def 10;
A61: go /. 1 = (Upper_Seq C,n) /. 1 by A14, SPRECT_3:39
.= W-min (L~ (Cage C,n)) by JORDAN1F:5 ;
then A62: go /. 1 = (Lower_Seq C,n) /. (len (Lower_Seq C,n)) by JORDAN1F:8
.= do /. (len do) by A13, JORDAN1J:35 ;
A63: rng go c= L~ go by A35, SPPOL_2:18;
A64: rng do c= L~ do by A38, SPPOL_2:18;
A65: {(go /. 1)} c= (L~ go) /\ (L~ do)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {(go /. 1)} or x in (L~ go) /\ (L~ do) )
assume x in {(go /. 1)} ; :: thesis: x in (L~ go) /\ (L~ do)
then A66: x = go /. 1 by TARSKI:def 1;
then A67: x in rng go by FINSEQ_6:46;
x in rng do by A62, A66, REVROT_1:3;
hence x in (L~ go) /\ (L~ do) by A63, A64, A67, XBOOLE_0:def 4; :: thesis: verum
end;
A68: (Lower_Seq C,n) . 1 = (Lower_Seq C,n) /. 1 by A29, PARTFUN1:def 8
.= E-max (L~ (Cage C,n)) by JORDAN1F:6 ;
A69: [(len (Gauge C,n)),j] in Indices (Gauge C,n) by A4, A15, A24, MATRIX_1:37;
(L~ go) /\ (L~ do) c= {(go /. 1)}
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in (L~ go) /\ (L~ do) or x in {(go /. 1)} )
assume A70: x in (L~ go) /\ (L~ do) ; :: thesis: x in {(go /. 1)}
then A71: x in L~ go by XBOOLE_0:def 4;
A72: x in L~ do by A70, XBOOLE_0:def 4;
then x in (L~ (Upper_Seq C,n)) /\ (L~ (Lower_Seq C,n)) by A48, A55, A71, XBOOLE_0:def 4;
then x in {(W-min (L~ (Cage C,n))),(E-max (L~ (Cage C,n)))} by JORDAN1E:20;
then A73: ( x = W-min (L~ (Cage C,n)) or x = E-max (L~ (Cage C,n)) ) by TARSKI:def 2;
now
assume x = E-max (L~ (Cage C,n)) ; :: thesis: contradiction
then A74: E-max (L~ (Cage C,n)) = (Gauge C,n) * i2,k by A13, A68, A72, JORDAN1E:11;
((Gauge C,n) * (len (Gauge C,n)),j) `1 = E-bound (L~ (Cage C,n)) by A4, A15, A20, JORDAN1A:92;
then (E-max (L~ (Cage C,n))) `1 <> E-bound (L~ (Cage C,n)) by A2, A3, A18, A69, A74, JORDAN1G:7;
hence contradiction by EUCLID:56; :: thesis: verum
end;
hence x in {(go /. 1)} by A61, A73, TARSKI:def 1; :: thesis: verum
end;
then A75: (L~ go) /\ (L~ do) = {(go /. 1)} by A65, XBOOLE_0:def 10;
set W2 = go /. 2;
A76: 2 in dom go by A35, FINSEQ_3:27;
A77: now
assume ((Gauge C,n) * i2,k) `1 = W-bound (L~ (Cage C,n)) ; :: thesis: contradiction
then ((Gauge C,n) * 1,k) `1 = ((Gauge C,n) * i2,k) `1 by A6, A16, A20, JORDAN1A:94;
hence contradiction by A1, A18, A25, JORDAN1G:7; :: thesis: verum
end;
go = mid (Upper_Seq C,n),1,(((Gauge C,n) * i1,j) .. (Upper_Seq C,n)) by A36, JORDAN1G:57
.= (Upper_Seq C,n) | (((Gauge C,n) * i1,j) .. (Upper_Seq C,n)) by A36, FINSEQ_4:31, FINSEQ_6:122 ;
then A78: go /. 2 = (Upper_Seq C,n) /. 2 by A76, FINSEQ_4:85;
A79: W-min (L~ (Cage C,n)) in rng go by A61, FINSEQ_6:46;
set pion = <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>;
A80: now
let n be Element of NAT ; :: thesis: ( n in dom <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> implies ex i, j being Element of NAT st
( [i,j] in Indices (Gauge C,n) & <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. n = (Gauge C,n) * i,j ) )
assume n in dom <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> ; :: thesis: ex i, j being Element of NAT st
( [i,j] in Indices (Gauge C,n) & <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. n = (Gauge C,n) * i,j )
then n in {1,2,3} by FINSEQ_3:1, FINSEQ_3:30;
then ( n = 1 or n = 2 or n = 3 ) by ENUMSET1:def 1;
hence ex i, j being Element of NAT st
( [i,j] in Indices (Gauge C,n) & <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. n = (Gauge C,n) * i,j ) by A17, A18, A19, FINSEQ_4:27; :: thesis: verum
end;
A81: ((Gauge C,n) * i1,k) `1 = ((Gauge C,n) * i1,1) `1 by A3, A6, A10, A16, GOBOARD5:3
.= ((Gauge C,n) * i1,j) `1 by A3, A4, A10, A15, GOBOARD5:3 ;
((Gauge C,n) * i1,k) `2 = ((Gauge C,n) * 1,k) `2 by A3, A6, A10, A16, GOBOARD5:2
.= ((Gauge C,n) * i2,k) `2 by A1, A6, A11, A16, GOBOARD5:2 ;
then A82: (Gauge C,n) * i1,k = |[(((Gauge C,n) * i1,j) `1 ),(((Gauge C,n) * i2,k) `2 )]| by A81, EUCLID:57;
A83: (Gauge C,n) * i1,k in LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) by RLTOPSP1:69;
A84: (Gauge C,n) * i1,k in LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) by RLTOPSP1:69;
now
per cases ( ( ((Gauge C,n) * i2,k) `1 <> ((Gauge C,n) * i1,j) `1 & ((Gauge C,n) * i2,k) `2 <> ((Gauge C,n) * i1,j) `2 ) or ((Gauge C,n) * i2,k) `1 = ((Gauge C,n) * i1,j) `1 or ((Gauge C,n) * i2,k) `2 = ((Gauge C,n) * i1,j) `2 ) ;
suppose ( ((Gauge C,n) * i2,k) `1 <> ((Gauge C,n) * i1,j) `1 & ((Gauge C,n) * i2,k) `2 <> ((Gauge C,n) * i1,j) `2 ) ; :: thesis: contradiction
then <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> is being_S-Seq by A82, TOPREAL3:41;
then consider pion1 being FinSequence of (TOP-REAL 2) such that
A85: pion1 is_sequence_on Gauge C,n and
A86: pion1 is being_S-Seq and
A87: L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> = L~ pion1 and
A88: <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. 1 = pion1 /. 1 and
A89: <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. (len <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) = pion1 /. (len pion1) and
A90: len <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> <= len pion1 by A80, GOBOARD3:2;
reconsider pion1 = pion1 as being_S-Seq FinSequence of (TOP-REAL 2) by A86;
set godo = (go ^' pion1) ^' do;
A91: ((Gauge C,n) * i1,k) `1 = ((Gauge C,n) * i1,1) `1 by A3, A6, A10, A16, GOBOARD5:3
.= ((Gauge C,n) * i1,j) `1 by A3, A4, A10, A15, GOBOARD5:3 ;
A92: ((Gauge C,n) * i2,k) `1 <= ((Gauge C,n) * i1,k) `1 by A1, A2, A3, A6, A16, JORDAN1A:39;
then A93: W-bound (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) = ((Gauge C,n) * i2,k) `1 by SPRECT_1:62;
A94: W-bound (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) = ((Gauge C,n) * i1,j) `1 by A91, SPRECT_1:62;
W-bound ((LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) \/ (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k))) = min (W-bound (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k))),(W-bound (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k))) by SPRECT_1:54
.= ((Gauge C,n) * i2,k) `1 by A91, A92, A93, A94, XXREAL_0:def 9 ;
then A95: W-bound (L~ pion1) = ((Gauge C,n) * i2,k) `1 by A87, TOPREAL3:23;
A96: 1 + 1 <= len (Cage C,n) by GOBOARD7:36, XXREAL_0:2;
A97: 1 + 1 <= len (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) by GOBOARD7:36, XXREAL_0:2;
len (go ^' pion1) >= len go by TOPREAL8:7;
then A98: len (go ^' pion1) >= 1 + 1 by A35, XXREAL_0:2;
then A99: len (go ^' pion1) > 1 + 0 by NAT_1:13;
A100: len ((go ^' pion1) ^' do) >= len (go ^' pion1) by TOPREAL8:7;
then A101: 1 + 1 <= len ((go ^' pion1) ^' do) by A98, XXREAL_0:2;
A102: Upper_Seq C,n is_sequence_on Gauge C,n by JORDAN1G:4;
A103: go /. (len go) = pion1 /. 1 by A43, A88, FINSEQ_4:27;
then A104: go ^' pion1 is_sequence_on Gauge C,n by A37, A85, TOPREAL8:12;
A105: (go ^' pion1) /. (len (go ^' pion1)) = <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. (len <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) by A89, GRAPH_2:58
.= <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. 3 by FINSEQ_1:62
.= do /. 1 by A44, FINSEQ_4:27 ;
then A106: (go ^' pion1) ^' do is_sequence_on Gauge C,n by A40, A104, TOPREAL8:12;
LSeg pion1,1 c= L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> by A87, TOPREAL3:26;
then A107: (LSeg go,((len go) -' 1)) /\ (LSeg pion1,1) c= {((Gauge C,n) * i1,j)} by A46, A53, XBOOLE_1:27;
len pion1 >= 2 + 1 by A90, FINSEQ_1:62;
then A108: len pion1 > 1 + 1 by NAT_1:13;
{((Gauge C,n) * i1,j)} c= (LSeg go,m) /\ (LSeg pion1,1)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {((Gauge C,n) * i1,j)} or x in (LSeg go,m) /\ (LSeg pion1,1) )
assume x in {((Gauge C,n) * i1,j)} ; :: thesis: x in (LSeg go,m) /\ (LSeg pion1,1)
then A109: x = (Gauge C,n) * i1,j by TARSKI:def 1;
A110: (Gauge C,n) * i1,j in LSeg go,m by A50, RLTOPSP1:69;
(Gauge C,n) * i1,j in LSeg pion1,1 by A43, A103, A108, TOPREAL1:27;
hence x in (LSeg go,m) /\ (LSeg pion1,1) by A109, A110, XBOOLE_0:def 4; :: thesis: verum
end;
then (LSeg go,((len go) -' 1)) /\ (LSeg pion1,1) = {(go /. (len go))} by A43, A46, A107, XBOOLE_0:def 10;
then A111: go ^' pion1 is unfolded by A103, TOPREAL8:34;
len pion1 >= 2 + 1 by A90, FINSEQ_1:62;
then A112: (len pion1) - 2 >= 0 by XREAL_1:21;
((len (go ^' pion1)) + 1) - 1 = ((len go) + (len pion1)) - 1 by GRAPH_2:13;
then (len (go ^' pion1)) - 1 = (len go) + ((len pion1) - 2)
.= (len go) + ((len pion1) -' 2) by A112, XREAL_0:def 2 ;
then A113: (len (go ^' pion1)) -' 1 = (len go) + ((len pion1) -' 2) by XREAL_0:def 2;
A114: (len pion1) - 1 >= 1 by A108, XREAL_1:21;
then A115: (len pion1) -' 1 = (len pion1) - 1 by XREAL_0:def 2;
A116: ((len pion1) -' 2) + 1 = ((len pion1) - 2) + 1 by A112, XREAL_0:def 2
.= (len pion1) -' 1 by A114, XREAL_0:def 2 ;
((len pion1) - 1) + 1 <= len pion1 ;
then A117: (len pion1) -' 1 < len pion1 by A115, NAT_1:13;
LSeg pion1,((len pion1) -' 1) c= L~ <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> by A87, TOPREAL3:26;
then A118: (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1) c= {((Gauge C,n) * i2,k)} by A60, XBOOLE_1:27;
{((Gauge C,n) * i2,k)} c= (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {((Gauge C,n) * i2,k)} or x in (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1) )
assume x in {((Gauge C,n) * i2,k)} ; :: thesis: x in (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1)
then A119: x = (Gauge C,n) * i2,k by TARSKI:def 1;
A120: (Gauge C,n) * i2,k in LSeg do,1 by A57, RLTOPSP1:69;
pion1 /. (((len pion1) -' 1) + 1) = <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. 3 by A89, A115, FINSEQ_1:62
.= (Gauge C,n) * i2,k by FINSEQ_4:27 ;
then (Gauge C,n) * i2,k in LSeg pion1,((len pion1) -' 1) by A114, A115, TOPREAL1:27;
hence x in (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1) by A119, A120, XBOOLE_0:def 4; :: thesis: verum
end;
then (LSeg pion1,((len pion1) -' 1)) /\ (LSeg do,1) = {((Gauge C,n) * i2,k)} by A118, XBOOLE_0:def 10;
then A121: (LSeg (go ^' pion1),((len go) + ((len pion1) -' 2))) /\ (LSeg do,1) = {((go ^' pion1) /. (len (go ^' pion1)))} by A44, A103, A105, A116, A117, TOPREAL8:31;
A122: not go ^' pion1 is trivial by A98, REALSET1:13;
A123: rng pion1 c= L~ pion1 by A108, SPPOL_2:18;
A124: {(pion1 /. 1)} c= (L~ go) /\ (L~ pion1)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {(pion1 /. 1)} or x in (L~ go) /\ (L~ pion1) )
assume x in {(pion1 /. 1)} ; :: thesis: x in (L~ go) /\ (L~ pion1)
then A125: x = pion1 /. 1 by TARSKI:def 1;
then A126: x in rng go by A103, REVROT_1:3;
x in rng pion1 by A125, FINSEQ_6:46;
hence x in (L~ go) /\ (L~ pion1) by A63, A123, A126, XBOOLE_0:def 4; :: thesis: verum
end;
(L~ go) /\ (L~ pion1) c= {(pion1 /. 1)}
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in (L~ go) /\ (L~ pion1) or x in {(pion1 /. 1)} )
assume A127: x in (L~ go) /\ (L~ pion1) ; :: thesis: x in {(pion1 /. 1)}
then A128: x in L~ go by XBOOLE_0:def 4;
x in L~ pion1 by A127, XBOOLE_0:def 4;
hence x in {(pion1 /. 1)} by A7, A12, A43, A48, A87, A103, A128, XBOOLE_0:def 4; :: thesis: verum
end;
then A129: (L~ go) /\ (L~ pion1) = {(pion1 /. 1)} by A124, XBOOLE_0:def 10;
then A130: go ^' pion1 is s.n.c. by A103, JORDAN1J:54;
(rng go) /\ (rng pion1) c= {(pion1 /. 1)} by A63, A123, A129, XBOOLE_1:27;
then A131: go ^' pion1 is one-to-one by JORDAN1J:55;
A132: <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. (len <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*>) = <*((Gauge C,n) * i1,j),((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)*> /. 3 by FINSEQ_1:62
.= do /. 1 by A44, FINSEQ_4:27 ;
A133: {(pion1 /. (len pion1))} c= (L~ do) /\ (L~ pion1)
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in {(pion1 /. (len pion1))} or x in (L~ do) /\ (L~ pion1) )
assume x in {(pion1 /. (len pion1))} ; :: thesis: x in (L~ do) /\ (L~ pion1)
then A134: x = pion1 /. (len pion1) by TARSKI:def 1;
then A135: x in rng do by A89, A132, FINSEQ_6:46;
x in rng pion1 by A134, REVROT_1:3;
hence x in (L~ do) /\ (L~ pion1) by A64, A123, A135, XBOOLE_0:def 4; :: thesis: verum
end;
(L~ do) /\ (L~ pion1) c= {(pion1 /. (len pion1))}
proof
let x be set ; :: according to TARSKI:def 3 :: thesis: ( not x in (L~ do) /\ (L~ pion1) or x in {(pion1 /. (len pion1))} )
assume A136: x in (L~ do) /\ (L~ pion1) ; :: thesis: x in {(pion1 /. (len pion1))}
then A137: x in L~ do by XBOOLE_0:def 4;
x in L~ pion1 by A136, XBOOLE_0:def 4;
hence x in {(pion1 /. (len pion1))} by A8, A12, A44, A55, A87, A89, A132, A137, XBOOLE_0:def 4; :: thesis: verum
end;
then A138: (L~ do) /\ (L~ pion1) = {(pion1 /. (len pion1))} by A133, XBOOLE_0:def 10;
A139: (L~ (go ^' pion1)) /\ (L~ do) = ((L~ go) \/ (L~ pion1)) /\ (L~ do) by A103, TOPREAL8:35
.= {(go /. 1)} \/ {(do /. 1)} by A75, A89, A132, A138, XBOOLE_1:23
.= {((go ^' pion1) /. 1)} \/ {(do /. 1)} by GRAPH_2:57
.= {((go ^' pion1) /. 1),(do /. 1)} by ENUMSET1:41 ;
do /. (len do) = (go ^' pion1) /. 1 by A62, GRAPH_2:57;
then reconsider godo = (go ^' pion1) ^' do as non constant standard special_circular_sequence by A101, A105, A106, A111, A113, A121, A122, A130, A131, A139, JORDAN8:7, JORDAN8:8, TOPREAL8:11, TOPREAL8:33, TOPREAL8:34;
A140: Upper_Arc C is_an_arc_of W-min C, E-max C by JORDAN6:def 8;
then A141: Upper_Arc C is connected by JORDAN6:11;
A142: W-min C in Upper_Arc C by A140, TOPREAL1:4;
A143: E-max C in Upper_Arc C by A140, TOPREAL1:4;
set ff = Rotate (Cage C,n),(W-min (L~ (Cage C,n)));
W-min (L~ (Cage C,n)) in rng (Cage C,n) by SPRECT_2:47;
then A144: (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) /. 1 = W-min (L~ (Cage C,n)) by FINSEQ_6:98;
A145: L~ (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) = L~ (Cage C,n) by REVROT_1:33;
then (W-max (L~ (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))))) .. (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) > 1 by A144, SPRECT_5:23;
then (N-min (L~ (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))))) .. (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) > 1 by A144, A145, SPRECT_5:24, XXREAL_0:2;
then (N-max (L~ (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))))) .. (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) > 1 by A144, A145, SPRECT_5:25, XXREAL_0:2;
then A146: (E-max (L~ (Cage C,n))) .. (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) > 1 by A144, A145, SPRECT_5:26, XXREAL_0:2;
A147: now
assume A148: ((Gauge C,n) * i1,j) .. (Upper_Seq C,n) <= 1 ; :: thesis: contradiction
((Gauge C,n) * i1,j) .. (Upper_Seq C,n) >= 1 by A36, FINSEQ_4:31;
then ((Gauge C,n) * i1,j) .. (Upper_Seq C,n) = 1 by A148, XXREAL_0:1;
then (Gauge C,n) * i1,j = (Upper_Seq C,n) /. 1 by A36, FINSEQ_5:41;
hence contradiction by A22, A26, JORDAN1F:5; :: thesis: verum
end;
A149: Cage C,n is_sequence_on Gauge C,n by JORDAN9:def 1;
then A150: Rotate (Cage C,n),(W-min (L~ (Cage C,n))) is_sequence_on Gauge C,n by REVROT_1:34;
A151: (right_cell godo,1,(Gauge C,n)) \ (L~ godo) c= RightComp godo by A101, A106, JORDAN9:29;
A152: L~ godo = (L~ (go ^' pion1)) \/ (L~ do) by A105, TOPREAL8:35
.= ((L~ go) \/ (L~ pion1)) \/ (L~ do) by A103, TOPREAL8:35 ;
A153: L~ (Cage C,n) = (L~ (Upper_Seq C,n)) \/ (L~ (Lower_Seq C,n)) by JORDAN1E:17;
then A154: L~ (Upper_Seq C,n) c= L~ (Cage C,n) by XBOOLE_1:7;
A155: L~ (Lower_Seq C,n) c= L~ (Cage C,n) by A153, XBOOLE_1:7;
A156: L~ go c= L~ (Cage C,n) by A48, A154, XBOOLE_1:1;
A157: L~ do c= L~ (Cage C,n) by A55, A155, XBOOLE_1:1;
A158: W-min C in C by SPRECT_1:15;
A159: now
assume W-min C in L~ godo ; :: thesis: contradiction
then A160: ( W-min C in (L~ go) \/ (L~ pion1) or W-min C in L~ do ) by A152, XBOOLE_0:def 3;
end;
right_cell (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))),1 = right_cell (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))),1,(GoB (Rotate (Cage C,n),(W-min (L~ (Cage C,n))))) by A97, JORDAN1H:29
.= right_cell (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))),1,(GoB (Cage C,n)) by REVROT_1:28
.= right_cell (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))),1,(Gauge C,n) by JORDAN1H:52
.= right_cell ((Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) -: (E-max (L~ (Cage C,n)))),1,(Gauge C,n) by A146, A150, JORDAN1J:53
.= right_cell (Upper_Seq C,n),1,(Gauge C,n) by JORDAN1E:def 1
.= right_cell (R_Cut (Upper_Seq C,n),((Gauge C,n) * i1,j)),1,(Gauge C,n) by A36, A102, A147, JORDAN1J:52
.= right_cell (go ^' pion1),1,(Gauge C,n) by A41, A104, JORDAN1J:51
.= right_cell godo,1,(Gauge C,n) by A99, A106, JORDAN1J:51 ;
then W-min C in right_cell godo,1,(Gauge C,n) by JORDAN1I:8;
then A161: W-min C in (right_cell godo,1,(Gauge C,n)) \ (L~ godo) by A159, XBOOLE_0:def 5;
A162: godo /. 1 = (go ^' pion1) /. 1 by GRAPH_2:57
.= W-min (L~ (Cage C,n)) by A61, GRAPH_2:57 ;
A163: len (Upper_Seq C,n) >= 2 by A21, XXREAL_0:2;
A164: godo /. 2 = (go ^' pion1) /. 2 by A98, GRAPH_2:61
.= (Upper_Seq C,n) /. 2 by A35, A78, GRAPH_2:61
.= ((Upper_Seq C,n) ^' (Lower_Seq C,n)) /. 2 by A163, GRAPH_2:61
.= (Rotate (Cage C,n),(W-min (L~ (Cage C,n)))) /. 2 by JORDAN1E:15 ;
A165: (L~ go) \/ (L~ do) is compact by COMPTS_1:19;
W-min (L~ (Cage C,n)) in (L~ go) \/ (L~ do) by A63, A79, XBOOLE_0:def 3;
then A166: W-min ((L~ go) \/ (L~ do)) = W-min (L~ (Cage C,n)) by A156, A157, A165, JORDAN1J:21, XBOOLE_1:8;
A167: (W-min ((L~ go) \/ (L~ do))) `1 = W-bound ((L~ go) \/ (L~ do)) by EUCLID:56;
A168: (W-min (L~ (Cage C,n))) `1 = W-bound (L~ (Cage C,n)) by EUCLID:56;
((Gauge C,n) * i2,k) `1 >= W-bound (L~ (Cage C,n)) by A13, A155, PSCOMP_1:71;
then ((Gauge C,n) * i2,k) `1 > W-bound (L~ (Cage C,n)) by A77, XXREAL_0:1;
then W-min (((L~ go) \/ (L~ do)) \/ (L~ pion1)) = W-min ((L~ go) \/ (L~ do)) by A95, A165, A166, A167, A168, JORDAN1J:33;
then A169: W-min (L~ godo) = W-min (L~ (Cage C,n)) by A152, A166, XBOOLE_1:4;
A170: rng godo c= L~ godo by A98, A100, SPPOL_2:18, XXREAL_0:2;
2 in dom godo by A101, FINSEQ_3:27;
then A171: godo /. 2 in rng godo by PARTFUN2:4;
godo /. 2 in W-most (L~ (Cage C,n)) by A164, JORDAN1I:27;
then (godo /. 2) `1 = (W-min (L~ godo)) `1 by A169, PSCOMP_1:88
.= W-bound (L~ godo) by EUCLID:56 ;
then godo /. 2 in W-most (L~ godo) by A170, A171, SPRECT_2:16;
then (Rotate godo,(W-min (L~ godo))) /. 2 in W-most (L~ godo) by A162, A169, FINSEQ_6:95;
then reconsider godo = godo as non constant standard clockwise_oriented special_circular_sequence by JORDAN1I:27;
len (Upper_Seq C,n) in dom (Upper_Seq C,n) by FINSEQ_5:6;
then A172: (Upper_Seq C,n) . (len (Upper_Seq C,n)) = (Upper_Seq C,n) /. (len (Upper_Seq C,n)) by PARTFUN1:def 8
.= E-max (L~ (Cage C,n)) by JORDAN1F:7 ;
A173: east_halfline (E-max C) misses L~ go
proof
assume east_halfline (E-max C) meets L~ go ; :: thesis: contradiction
then consider p being set such that
A174: p in east_halfline (E-max C) and
A175: p in L~ go by XBOOLE_0:3;
reconsider p = p as Point of (TOP-REAL 2) by A174;
p in L~ (Upper_Seq C,n) by A48, A175;
then p in (east_halfline (E-max C)) /\ (L~ (Cage C,n)) by A154, A174, XBOOLE_0:def 4;
then A176: p `1 = E-bound (L~ (Cage C,n)) by JORDAN1A:104, PSCOMP_1:111;
then A177: p = E-max (L~ (Cage C,n)) by A48, A175, JORDAN1J:46;
then E-max (L~ (Cage C,n)) = (Gauge C,n) * i1,j by A14, A172, A175, JORDAN1J:43;
then ((Gauge C,n) * i1,j) `1 = ((Gauge C,n) * (len (Gauge C,n)),k) `1 by A6, A16, A20, A176, A177, JORDAN1A:92;
hence contradiction by A3, A17, A32, JORDAN1G:7; :: thesis: verum
end;
now
assume east_halfline (E-max C) meets L~ godo ; :: thesis: contradiction
then A178: ( east_halfline (E-max C) meets (L~ go) \/ (L~ pion1) or east_halfline (E-max C) meets L~ do ) by A152, XBOOLE_1:70;
per cases ( east_halfline (E-max C) meets L~ go or east_halfline (E-max C) meets L~ pion1 or east_halfline (E-max C) meets L~ do ) by A178, XBOOLE_1:70;
suppose east_halfline (E-max C) meets L~ pion1 ; :: thesis: contradiction
then consider p being set such that
A179: p in east_halfline (E-max C) and
A180: p in L~ pion1 by XBOOLE_0:3;
reconsider p = p as Point of (TOP-REAL 2) by A179;
A181: now
per cases ( p in LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) or p in LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) ) by A12, A87, A180, XBOOLE_0:def 3;
suppose p in LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) ; :: thesis: p `1 <= ((Gauge C,n) * i1,j) `1
hence p `1 <= ((Gauge C,n) * i1,j) `1 by A91, A92, TOPREAL1:9; :: thesis: verum
end;
suppose p in LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) ; :: thesis: p `1 <= ((Gauge C,n) * i1,j) `1
hence p `1 <= ((Gauge C,n) * i1,j) `1 by A91, GOBOARD7:5; :: thesis: verum
end;
end;
end;
i1 + 1 <= len (Gauge C,n) by A3, NAT_1:13;
then i1 <= (len (Gauge C,n)) - 1 by XREAL_1:21;
then A182: i1 <= (len (Gauge C,n)) -' 1 by XREAL_0:def 2;
(len (Gauge C,n)) -' 1 <= len (Gauge C,n) by NAT_D:35;
then ((Gauge C,n) * i1,j) `1 <= ((Gauge C,n) * ((len (Gauge C,n)) -' 1),1) `1 by A4, A10, A15, A20, A24, A182, JORDAN1A:39;
then p `1 <= ((Gauge C,n) * ((len (Gauge C,n)) -' 1),1) `1 by A181, XXREAL_0:2;
then p `1 <= E-bound C by A24, JORDAN8:15;
then A183: p `1 <= (E-max C) `1 by EUCLID:56;
p `1 >= (E-max C) `1 by A179, TOPREAL1:def 13;
then A184: p `1 = (E-max C) `1 by A183, XXREAL_0:1;
p `2 = (E-max C) `2 by A179, TOPREAL1:def 13;
then p = E-max C by A184, TOPREAL3:11;
hence contradiction by A9, A12, A87, A143, A180, XBOOLE_0:3; :: thesis: verum
end;
suppose east_halfline (E-max C) meets L~ do ; :: thesis: contradiction
then consider p being set such that
A185: p in east_halfline (E-max C) and
A186: p in L~ do by XBOOLE_0:3;
reconsider p = p as Point of (TOP-REAL 2) by A185;
p in L~ (Lower_Seq C,n) by A55, A186;
then p in (east_halfline (E-max C)) /\ (L~ (Cage C,n)) by A155, A185, XBOOLE_0:def 4;
then A187: p `1 = E-bound (L~ (Cage C,n)) by JORDAN1A:104, PSCOMP_1:111;
A188: (E-max C) `2 = p `2 by A185, TOPREAL1:def 13;
set RC = Rotate (Cage C,n),(E-max (L~ (Cage C,n)));
A189: E-max C in right_cell (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))),1 by JORDAN1I:9;
A190: 1 + 1 <= len (Lower_Seq C,n) by A27, XXREAL_0:2;
Lower_Seq C,n = (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) -: (W-min (L~ (Cage C,n))) by JORDAN1G:26;
then A191: LSeg (Lower_Seq C,n),1 = LSeg (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))),1 by A190, SPPOL_2:9;
A192: L~ (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) = L~ (Cage C,n) by REVROT_1:33;
A193: len (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) = len (Cage C,n) by REVROT_1:14;
A194: GoB (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) = GoB (Cage C,n) by REVROT_1:28
.= Gauge C,n by JORDAN1H:52 ;
A195: E-max (L~ (Cage C,n)) in rng (Cage C,n) by SPRECT_2:50;
A196: Rotate (Cage C,n),(E-max (L~ (Cage C,n))) is_sequence_on Gauge C,n by A149, REVROT_1:34;
A197: (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) /. 1 = E-max (L~ (Rotate (Cage C,n),(E-max (L~ (Cage C,n))))) by A192, A195, FINSEQ_6:98;
consider ii, jj being Element of NAT such that
A198: [ii,(jj + 1)] in Indices (Gauge C,n) and
A199: [ii,jj] in Indices (Gauge C,n) and
A200: (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) /. 1 = (Gauge C,n) * ii,(jj + 1) and
A201: (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) /. (1 + 1) = (Gauge C,n) * ii,jj by A96, A192, A193, A195, A196, FINSEQ_6:98, JORDAN1I:25;
consider jj2 being Element of NAT such that
A202: 1 <= jj2 and
A203: jj2 <= width (Gauge C,n) and
A204: E-max (L~ (Cage C,n)) = (Gauge C,n) * (len (Gauge C,n)),jj2 by JORDAN1D:29;
A205: len (Gauge C,n) >= 4 by JORDAN8:13;
then len (Gauge C,n) >= 1 by XXREAL_0:2;
then [(len (Gauge C,n)),jj2] in Indices (Gauge C,n) by A202, A203, MATRIX_1:37;
then A206: ii = len (Gauge C,n) by A192, A197, A198, A200, A204, GOBOARD1:21;
A207: 1 <= ii by A198, MATRIX_1:39;
A208: ii <= len (Gauge C,n) by A198, MATRIX_1:39;
A209: 1 <= jj + 1 by A198, MATRIX_1:39;
A210: jj + 1 <= width (Gauge C,n) by A198, MATRIX_1:39;
A211: 1 <= ii by A199, MATRIX_1:39;
A212: ii <= len (Gauge C,n) by A199, MATRIX_1:39;
A213: 1 <= jj by A199, MATRIX_1:39;
A214: jj <= width (Gauge C,n) by A199, MATRIX_1:39;
A215: ii + 1 <> ii ;
(jj + 1) + 1 <> jj ;
then A216: right_cell (Rotate (Cage C,n),(E-max (L~ (Cage C,n)))),1 = cell (Gauge C,n),(ii -' 1),jj by A96, A193, A194, A198, A199, A200, A201, A215, GOBOARD5:def 6;
A217: (ii -' 1) + 1 = ii by A207, XREAL_1:237;
ii - 1 >= 4 - 1 by A205, A206, XREAL_1:11;
then A218: ii - 1 >= 1 by XXREAL_0:2;
then A219: 1 <= ii -' 1 by XREAL_0:def 2;
A220: ((Gauge C,n) * (ii -' 1),jj) `2 <= p `2 by A188, A189, A208, A210, A213, A216, A217, A218, JORDAN9:19;
A221: p `2 <= ((Gauge C,n) * (ii -' 1),(jj + 1)) `2 by A188, A189, A208, A210, A213, A216, A217, A218, JORDAN9:19;
A222: ii -' 1 < len (Gauge C,n) by A208, A217, NAT_1:13;
then A223: ((Gauge C,n) * (ii -' 1),jj) `2 = ((Gauge C,n) * 1,jj) `2 by A213, A214, A219, GOBOARD5:2
.= ((Gauge C,n) * ii,jj) `2 by A211, A212, A213, A214, GOBOARD5:2 ;
A224: ((Gauge C,n) * (ii -' 1),(jj + 1)) `2 = ((Gauge C,n) * 1,(jj + 1)) `2 by A209, A210, A219, A222, GOBOARD5:2
.= ((Gauge C,n) * ii,(jj + 1)) `2 by A207, A208, A209, A210, GOBOARD5:2 ;
A225: ((Gauge C,n) * (len (Gauge C,n)),jj) `1 = E-bound (L~ (Cage C,n)) by A20, A213, A214, JORDAN1A:92;
E-bound (L~ (Cage C,n)) = ((Gauge C,n) * (len (Gauge C,n)),(jj + 1)) `1 by A20, A209, A210, JORDAN1A:92;
then p in LSeg ((Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) /. 1),((Rotate (Cage C,n),(E-max (L~ (Cage C,n)))) /. (1 + 1)) by A187, A200, A201, A206, A220, A221, A223, A224, A225, GOBOARD7:8;
then A226: p in LSeg (Lower_Seq C,n),1 by A96, A191, A193, TOPREAL1:def 5;
A227: p in LSeg do,(Index p,do) by A186, JORDAN3:42;
A228: do = mid (Lower_Seq C,n),(((Gauge C,n) * i2,k) .. (Lower_Seq C,n)),(len (Lower_Seq C,n)) by A39, JORDAN1J:37;
A229: 1 <= ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) by A39, FINSEQ_4:31;
A230: ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) <= len (Lower_Seq C,n) by A39, FINSEQ_4:31;
((Gauge C,n) * i2,k) .. (Lower_Seq C,n) <> len (Lower_Seq C,n) by A31, A39, FINSEQ_4:29;
then A231: ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) < len (Lower_Seq C,n) by A230, XXREAL_0:1;
A232: 1 <= Index p,do by A186, JORDAN3:41;
A233: Index p,do < len do by A186, JORDAN3:41;
A234: (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) + 1 = ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) by A34, A39, JORDAN1J:56;
consider t being Nat such that
A235: t in dom (Lower_Seq C,n) and
A236: (Lower_Seq C,n) . t = (Gauge C,n) * i2,k by A39, FINSEQ_2:11;
A237: 1 <= t by A235, FINSEQ_3:27;
A238: t <= len (Lower_Seq C,n) by A235, FINSEQ_3:27;
1 < t by A34, A236, A237, XXREAL_0:1;
then (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) + 1 = t by A236, A238, JORDAN3:45;
then A239: len (L_Cut (Lower_Seq C,n),((Gauge C,n) * i2,k)) = (len (Lower_Seq C,n)) - (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) by A13, A236, JORDAN3:61;
set tt = ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1;
A240: 1 <= Index ((Gauge C,n) * i2,k),(Lower_Seq C,n) by A13, JORDAN3:41;
0 + (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) < len (Lower_Seq C,n) by A13, JORDAN3:41;
then A241: (len (Lower_Seq C,n)) - (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) > 0 by XREAL_1:22;
Index p,do < (len (Lower_Seq C,n)) -' (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) by A233, A239, XREAL_0:def 2;
then (Index p,do) + 1 <= (len (Lower_Seq C,n)) -' (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n)) by NAT_1:13;
then Index p,do <= ((len (Lower_Seq C,n)) -' (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n))) - 1 by XREAL_1:21;
then Index p,do <= ((len (Lower_Seq C,n)) - (Index ((Gauge C,n) * i2,k),(Lower_Seq C,n))) - 1 by A241, XREAL_0:def 2;
then Index p,do <= (len (Lower_Seq C,n)) - (((Gauge C,n) * i2,k) .. (Lower_Seq C,n)) by A234;
then Index p,do <= (len (Lower_Seq C,n)) -' (((Gauge C,n) * i2,k) .. (Lower_Seq C,n)) by XREAL_0:def 2;
then Index p,do < ((len (Lower_Seq C,n)) -' (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) + 1 by NAT_1:13;
then A242: LSeg (mid (Lower_Seq C,n),(((Gauge C,n) * i2,k) .. (Lower_Seq C,n)),(len (Lower_Seq C,n))),(Index p,do) = LSeg (Lower_Seq C,n),(((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1) by A229, A231, A232, JORDAN4:31;
A243: 1 + 1 <= ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) by A234, A240, XREAL_1:9;
then (Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n)) >= (1 + 1) + 1 by A232, XREAL_1:9;
then ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) - 1 >= ((1 + 1) + 1) - 1 by XREAL_1:11;
then A244: ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1 >= 1 + 1 by XREAL_0:def 2;
A245: 2 in dom (Lower_Seq C,n) by A190, FINSEQ_3:27;
now
per cases ( ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1 > 1 + 1 or ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1 = 1 + 1 ) by A244, XXREAL_0:1;
suppose ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1 > 1 + 1 ; :: thesis: contradiction
then LSeg (Lower_Seq C,n),1 misses LSeg (Lower_Seq C,n),(((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1) by TOPREAL1:def 9;
hence contradiction by A226, A227, A228, A242, XBOOLE_0:3; :: thesis: verum
end;
suppose A246: ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1 = 1 + 1 ; :: thesis: contradiction
then (LSeg (Lower_Seq C,n),1) /\ (LSeg (Lower_Seq C,n),(((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) -' 1)) = {((Lower_Seq C,n) /. 2)} by A27, TOPREAL1:def 8;
then p in {((Lower_Seq C,n) /. 2)} by A226, A227, A228, A242, XBOOLE_0:def 4;
then A247: p = (Lower_Seq C,n) /. 2 by TARSKI:def 1;
then A248: p .. (Lower_Seq C,n) = 2 by A245, FINSEQ_5:44;
1 + 1 = ((Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n))) - 1 by A246, XREAL_0:def 2;
then (1 + 1) + 1 = (Index p,do) + (((Gauge C,n) * i2,k) .. (Lower_Seq C,n)) ;
then A249: ((Gauge C,n) * i2,k) .. (Lower_Seq C,n) = 2 by A232, A243, JORDAN1E:10;
p in rng (Lower_Seq C,n) by A245, A247, PARTFUN2:4;
then p = (Gauge C,n) * i2,k by A39, A248, A249, FINSEQ_5:10;
then ((Gauge C,n) * i2,k) `1 = E-bound (L~ (Cage C,n)) by A247, JORDAN1G:40;
then ((Gauge C,n) * i2,k) `1 = ((Gauge C,n) * (len (Gauge C,n)),j) `1 by A4, A15, A20, JORDAN1A:92;
hence contradiction by A2, A3, A18, A69, JORDAN1G:7; :: thesis: verum
end;
end;
end;
hence contradiction ; :: thesis: verum
end;
end;
end;
then east_halfline (E-max C) c= (L~ godo) ` by SUBSET_1:43;
then consider W being Subset of (TOP-REAL 2) such that
A250: W is_a_component_of (L~ godo) ` and
A251: east_halfline (E-max C) c= W by GOBOARD9:5;
not W is Bounded by A251, JORDAN2C:16, JORDAN2C:129;
then W is_outside_component_of L~ godo by A250, JORDAN2C:def 4;
then W c= UBD (L~ godo) by JORDAN2C:27;
then A252: east_halfline (E-max C) c= UBD (L~ godo) by A251, XBOOLE_1:1;
E-max C in east_halfline (E-max C) by TOPREAL1:45;
then E-max C in UBD (L~ godo) by A252;
then E-max C in LeftComp godo by GOBRD14:46;
then Upper_Arc C meets L~ godo by A141, A142, A143, A151, A161, JORDAN1J:36;
then A253: ( Upper_Arc C meets (L~ go) \/ (L~ pion1) or Upper_Arc C meets L~ do ) by A152, XBOOLE_1:70;
A254: Upper_Arc C c= C by JORDAN6:76;
hence contradiction ; :: thesis: verum
end;
suppose ((Gauge C,n) * i2,k) `1 = ((Gauge C,n) * i1,j) `1 ; :: thesis: contradiction
then A255: i1 = i2 by A17, A18, JORDAN1G:7;
then LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) = {((Gauge C,n) * i1,k)} by RLTOPSP1:71;
then LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) c= LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) by A83, ZFMISC_1:37;
then (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) = LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) by XBOOLE_1:12;
hence contradiction by A1, A3, A4, A5, A6, A7, A8, A9, A255, Th13; :: thesis: verum
end;
suppose ((Gauge C,n) * i2,k) `2 = ((Gauge C,n) * i1,j) `2 ; :: thesis: contradiction
then A256: j = k by A17, A18, JORDAN1G:6;
then LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) = {((Gauge C,n) * i1,k)} by RLTOPSP1:71;
then LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k) c= LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) by A84, ZFMISC_1:37;
then (LSeg ((Gauge C,n) * i1,j),((Gauge C,n) * i1,k)) \/ (LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k)) = LSeg ((Gauge C,n) * i1,k),((Gauge C,n) * i2,k) by XBOOLE_1:12;
hence contradiction by A1, A2, A3, A4, A6, A7, A8, A9, A256, JORDAN15:31; :: thesis: verum
end;
end;
end;
hence contradiction ; :: thesis: verum