:: Weakly Standard Ordering of Instruction Locations
:: by Andrzej Trybulec , Piotr Rudnicki and Artur Korni{\l}owicz
::
:: Copyright (c) 2010-2021 Association of Mizar Users

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated AMI-Struct over N;
let l1, l2 be Nat;
pred l1 <= l2,S means :: AMI_WSTD:def 1
ex f being non empty FinSequence of NAT st
( f /. 1 = l1 & f /. (len f) = l2 & ( for n being Element of NAT st 1 <= n & n < len f holds
f /. (n + 1) in SUCC ((f /. n),S) ) );
end;

:: deftheorem defines <= AMI_WSTD:def 1 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for l1, l2 being Nat holds
( l1 <= l2,S iff ex f being non empty FinSequence of NAT st
( f /. 1 = l1 & f /. (len f) = l2 & ( for n being Element of NAT st 1 <= n & n < len f holds
f /. (n + 1) in SUCC ((f /. n),S) ) ) );

theorem :: AMI_WSTD:1
for l3 being Element of NAT
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for l1, l2 being Nat st l1 <= l2,S & l2 <= l3,S holds
l1 <= l3,S
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated AMI-Struct over N;
attr S is InsLoc-antisymmetric means :: AMI_WSTD:def 2
for l1, l2 being Element of NAT st l1 <= l2,S & l2 <= l1,S holds
l1 = l2;
end;

:: deftheorem defines InsLoc-antisymmetric AMI_WSTD:def 2 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N holds
( S is InsLoc-antisymmetric iff for l1, l2 being Element of NAT st l1 <= l2,S & l2 <= l1,S holds
l1 = l2 );

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated AMI-Struct over N;
attr S is weakly_standard means :Def3: :: AMI_WSTD:def 3
ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) );
end;

:: deftheorem Def3 defines weakly_standard AMI_WSTD:def 3 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N holds
( S is weakly_standard iff ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) ) );

theorem Th2: :: AMI_WSTD:2
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for f1, f2 being sequence of NAT st f1 is bijective & ( for m, n being Element of NAT holds
( m <= n iff f1 . m <= f1 . n,S ) ) & f2 is bijective & ( for m, n being Element of NAT holds
( m <= n iff f2 . m <= f2 . n,S ) ) holds
f1 = f2
proof end;

Lm1: for k being Element of NAT
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N holds k <= k,S

proof end;

theorem Th3: :: AMI_WSTD:3
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for f being sequence of NAT st f is bijective holds
( ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) iff for k being Element of NAT holds
( f . (k + 1) in SUCC ((f . k),S) & ( for j being Element of NAT st f . j in SUCC ((f . k),S) holds
k <= j ) ) )
proof end;

theorem Th4: :: AMI_WSTD:4
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N holds
( S is weakly_standard iff ex f being sequence of NAT st
( f is bijective & ( for k being Element of NAT holds
( f . (k + 1) in SUCC ((f . k),S) & ( for j being Element of NAT st f . j in SUCC ((f . k),S) holds
k <= j ) ) ) ) )
proof end;

set III = {[1,0,0],[0,0,0]};

Lm2: for N being with_zero set
for i being Instruction of (STC N)
for s being State of (STC N) st InsCode i = 1 holds
IC (Exec (i,s)) = (IC s) + 1

proof end;

Lm3: for z being Nat
for N being with_zero set
for l being Element of NAT
for i being Element of the InstructionsF of (STC N) st l = z & InsCode i = 1 holds
NIC (i,l) = {(z + 1)}

proof end;

registration
let N be with_zero set ;
coherence
proof end;
end;

registration
let N be with_zero set ;
existence
ex b1 being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N st
( b1 is weakly_standard & b1 is halting )
proof end;
end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let k be natural Number ;
func il. (S,k) -> Element of NAT means :Def4: :: AMI_WSTD:def 4
ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) & it = f . k );
existence
ex b1 being Element of NAT ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) & b1 = f . k )
proof end;
uniqueness
for b1, b2 being Element of NAT st ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) & b1 = f . k ) & ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) & b2 = f . k ) holds
b1 = b2
by Th2;
end;

:: deftheorem Def4 defines il. AMI_WSTD:def 4 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for k being natural Number
for b4 being Element of NAT holds
( b4 = il. (S,k) iff ex f being sequence of NAT st
( f is bijective & ( for m, n being Element of NAT holds
( m <= n iff f . m <= f . n,S ) ) & b4 = f . k ) );

theorem Th5: :: AMI_WSTD:5
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for k1, k2 being Nat st il. (T,k1) = il. (T,k2) holds
k1 = k2
proof end;

theorem Th6: :: AMI_WSTD:6
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l being Nat ex k being Nat st l = il. (T,k)
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let l be Nat;
func locnum (l,S) -> Nat means :Def5: :: AMI_WSTD:def 5
il. (S,it) = l;
existence
ex b1 being Nat st il. (S,b1) = l
by Th6;
uniqueness
for b1, b2 being Nat st il. (S,b1) = l & il. (S,b2) = l holds
b1 = b2
by Th5;
end;

:: deftheorem Def5 defines locnum AMI_WSTD:def 5 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l, b4 being Nat holds
( b4 = locnum (l,S) iff il. (S,b4) = l );

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let l be Nat;
:: original: locnum
redefine func locnum (l,S) -> Element of NAT ;
coherence
locnum (l,S) is Element of NAT
by ORDINAL1:def 12;
end;

theorem Th7: :: AMI_WSTD:7
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l1, l2 being Element of NAT st locnum (l1,T) = locnum (l2,T) holds
l1 = l2
proof end;

theorem Th8: :: AMI_WSTD:8
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for k1, k2 being natural Number holds
( il. (T,k1) <= il. (T,k2),T iff k1 <= k2 )
proof end;

theorem Th9: :: AMI_WSTD:9
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l1, l2 being Element of NAT holds
( locnum (l1,T) <= locnum (l2,T) iff l1 <= l2,T )
proof end;

theorem Th10: :: AMI_WSTD:10
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N holds T is InsLoc-antisymmetric
proof end;

registration
let N be with_zero set ;
coherence
for b1 being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N st b1 is weakly_standard holds
b1 is InsLoc-antisymmetric
by Th10;
end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let f be Element of NAT ;
let k be Nat;
func f + (k,S) -> Element of NAT equals :: AMI_WSTD:def 6
il. (S,((locnum (f,S)) + k));
coherence
il. (S,((locnum (f,S)) + k)) is Element of NAT
;
end;

:: deftheorem defines + AMI_WSTD:def 6 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT
for k being Nat holds f + (k,S) = il. (S,((locnum (f,S)) + k));

theorem :: AMI_WSTD:11
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT holds f + (0,T) = f by Def5;

theorem :: AMI_WSTD:12
for z being Nat
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f, g being Element of NAT st f + (z,T) = g + (z,T) holds
f = g
proof end;

theorem :: AMI_WSTD:13
for z being Nat
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT holds (locnum (f,T)) + z = locnum ((f + (z,T)),T) by Def5;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let f be Element of NAT ;
func NextLoc (f,S) -> Element of NAT equals :: AMI_WSTD:def 7
f + (1,S);
coherence
f + (1,S) is Element of NAT
;
end;

:: deftheorem defines NextLoc AMI_WSTD:def 7 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT holds NextLoc (f,S) = f + (1,S);

theorem :: AMI_WSTD:14
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT holds NextLoc (f,T) = il. (T,((locnum (f,T)) + 1)) ;

theorem Th15: :: AMI_WSTD:15
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f being Element of NAT holds f <> NextLoc (f,T)
proof end;

theorem :: AMI_WSTD:16
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for f, g being Element of NAT st NextLoc (f,T) = NextLoc (g,T) holds
f = g
proof end;

theorem Th17: :: AMI_WSTD:17
for z being Nat
for N being with_zero set holds il. ((STC N),z) = z
proof end;

theorem :: AMI_WSTD:18
for N being with_zero set
for i being Instruction of (STC N)
for s being State of (STC N) st InsCode i = 1 holds
IC (Exec (i,s)) = NextLoc ((IC s),(STC N))
proof end;

theorem :: AMI_WSTD:19
for N being with_zero set
for l being Element of NAT
for i being Element of the InstructionsF of (STC N) st InsCode i = 1 holds
NIC (i,l) = {(NextLoc (l,(STC N)))}
proof end;

theorem :: AMI_WSTD:20
for N being with_zero set
for l being Element of NAT holds SUCC (l,(STC N)) = {l,(NextLoc (l,(STC N)))}
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let i be Instruction of S;
attr i is sequential means :: AMI_WSTD:def 8
for s being State of S holds (Exec (i,s)) . () = NextLoc ((IC s),S);
end;

:: deftheorem defines sequential AMI_WSTD:def 8 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for i being Instruction of S holds
( i is sequential iff for s being State of S holds (Exec (i,s)) . () = NextLoc ((IC s),S) );

theorem Th21: :: AMI_WSTD:21
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for il being Element of NAT
for i being Instruction of S st i is sequential holds
NIC (i,il) = {(NextLoc (il,S))}
proof end;

theorem Th22: :: AMI_WSTD:22
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for i being Instruction of S st i is sequential holds
not i is halting
proof end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
cluster sequential -> non halting for Element of the InstructionsF of S;
coherence
for b1 being Instruction of S st b1 is sequential holds
not b1 is halting
by Th22;
cluster halting -> non sequential for Element of the InstructionsF of S;
coherence
for b1 being Instruction of S st b1 is halting holds
not b1 is sequential
;
end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let F be NAT -defined the InstructionsF of S -valued Function;
attr F is para-closed means :: AMI_WSTD:def 9
for s being State of S st IC s = il. (S,0) holds
for k being Element of NAT holds IC (Comput (F,s,k)) in dom F;
end;

:: deftheorem defines para-closed AMI_WSTD:def 9 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued Function holds
( F is para-closed iff for s being State of S st IC s = il. (S,0) holds
for k being Element of NAT holds IC (Comput (F,s,k)) in dom F );

theorem Th23: :: AMI_WSTD:23
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued finite Function st F is really-closed & il. (S,0) in dom F holds
F is para-closed by AMISTD_1:14;

theorem Th24: :: AMI_WSTD:24
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N holds (il. (S,0)) .--> (halt S) is really-closed
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated AMI-Struct over N;
let F be NAT -defined the InstructionsF of S -valued finite Function;
attr F is lower means :Def10: :: AMI_WSTD:def 10
for l being Element of NAT st l in dom F holds
for m being Element of NAT st m <= l,S holds
m in dom F;
end;

:: deftheorem Def10 defines lower AMI_WSTD:def 10 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued finite Function holds
( F is lower iff for l being Element of NAT st l in dom F holds
for m being Element of NAT st m <= l,S holds
m in dom F );

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated AMI-Struct over N;
coherence
for b1 being NAT -defined the InstructionsF of S -valued finite Function st b1 is empty holds
b1 is lower
;
end;

theorem Th25: :: AMI_WSTD:25
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for i being Element of the InstructionsF of T holds (il. (T,0)) .--> i is lower
proof end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
existence
ex b1 being NAT -defined the InstructionsF of S -valued finite Function st
( b1 is lower & b1 is 1 -element )
proof end;
end;

theorem Th26: :: AMI_WSTD:26
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite lower Function holds il. (T,0) in dom F
proof end;

theorem Th27: :: AMI_WSTD:27
for z being Nat
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for P being NAT -defined the InstructionsF of b3 -valued finite lower Function holds
( z < card P iff il. (T,z) in dom P )
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let F be NAT -defined the InstructionsF of S -valued non empty finite Function;
func LastLoc F -> Element of NAT means :Def11: :: AMI_WSTD:def 11
ex M being non empty finite natural-membered set st
( M = { (locnum (l,S)) where l is Element of NAT : l in dom F } & it = il. (S,(max M)) );
existence
ex b1 being Element of NAT ex M being non empty finite natural-membered set st
( M = { (locnum (l,S)) where l is Element of NAT : l in dom F } & b1 = il. (S,(max M)) )
proof end;
uniqueness
for b1, b2 being Element of NAT st ex M being non empty finite natural-membered set st
( M = { (locnum (l,S)) where l is Element of NAT : l in dom F } & b1 = il. (S,(max M)) ) & ex M being non empty finite natural-membered set st
( M = { (locnum (l,S)) where l is Element of NAT : l in dom F } & b2 = il. (S,(max M)) ) holds
b1 = b2
;
end;

:: deftheorem Def11 defines LastLoc AMI_WSTD:def 11 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite Function
for b4 being Element of NAT holds
( b4 = LastLoc F iff ex M being non empty finite natural-membered set st
( M = { (locnum (l,S)) where l is Element of NAT : l in dom F } & b4 = il. (S,(max M)) ) );

theorem Th28: :: AMI_WSTD:28
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite Function holds LastLoc F in dom F
proof end;

theorem :: AMI_WSTD:29
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F, G being NAT -defined the InstructionsF of b2 -valued non empty finite Function st F c= G holds
LastLoc F <= LastLoc G,T
proof end;

theorem Th30: :: AMI_WSTD:30
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite Function
for l being Element of NAT st l in dom F holds
l <= LastLoc F,T
proof end;

theorem :: AMI_WSTD:31
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite lower Function
for G being NAT -defined the InstructionsF of b2 -valued non empty finite Function st F c= G & LastLoc F = LastLoc G holds
F = G
proof end;

theorem Th32: :: AMI_WSTD:32
for N being with_zero set
for T being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite lower Function holds LastLoc F = il. (T,((card F) -' 1))
proof end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
coherence
for b1 being NAT -defined the InstructionsF of S -valued finite Function st b1 is really-closed & b1 is lower & not b1 is empty holds
b1 is para-closed
by ;
end;

Lm4: now :: thesis: for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N holds
( ((il. (S,0)) .--> (halt S)) . (LastLoc ((il. (S,0)) .--> (halt S))) = halt S & ( for l being Element of NAT st ((il. (S,0)) .--> (halt S)) . l = halt S & l in dom ((il. (S,0)) .--> (halt S)) holds
l = LastLoc ((il. (S,0)) .--> (halt S)) ) )
let N be with_zero set ; :: thesis: for S being non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N holds
( ((il. (S,0)) .--> (halt S)) . (LastLoc ((il. (S,0)) .--> (halt S))) = halt S & ( for l being Element of NAT st ((il. (S,0)) .--> (halt S)) . l = halt S & l in dom ((il. (S,0)) .--> (halt S)) holds
l = LastLoc ((il. (S,0)) .--> (halt S)) ) )

let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N; :: thesis: ( ((il. (S,0)) .--> (halt S)) . (LastLoc ((il. (S,0)) .--> (halt S))) = halt S & ( for l being Element of NAT st ((il. (S,0)) .--> (halt S)) . l = halt S & l in dom ((il. (S,0)) .--> (halt S)) holds
l = LastLoc ((il. (S,0)) .--> (halt S)) ) )

set F = (il. (S,0)) .--> (halt S);
A1: card (dom ((il. (S,0)) .--> (halt S))) = 1 by CARD_1:30;
(il. (S,0)) .--> (halt S) is NAT -defined the InstructionsF of S -valued finite lower Function by Th25;
then A2: LastLoc ((il. (S,0)) .--> (halt S)) = il. (S,((card ((il. (S,0)) .--> (halt S))) -' 1)) by Th32
.= il. (S,((card (dom ((il. (S,0)) .--> (halt S)))) -' 1)) by CARD_1:62
.= il. (S,0) by ;
hence ((il. (S,0)) .--> (halt S)) . (LastLoc ((il. (S,0)) .--> (halt S))) = halt S by FUNCOP_1:72; :: thesis: for l being Element of NAT st ((il. (S,0)) .--> (halt S)) . l = halt S & l in dom ((il. (S,0)) .--> (halt S)) holds
l = LastLoc ((il. (S,0)) .--> (halt S))

let l be Element of NAT ; :: thesis: ( ((il. (S,0)) .--> (halt S)) . l = halt S & l in dom ((il. (S,0)) .--> (halt S)) implies l = LastLoc ((il. (S,0)) .--> (halt S)) )
assume ((il. (S,0)) .--> (halt S)) . l = halt S ; :: thesis: ( l in dom ((il. (S,0)) .--> (halt S)) implies l = LastLoc ((il. (S,0)) .--> (halt S)) )
assume l in dom ((il. (S,0)) .--> (halt S)) ; :: thesis: l = LastLoc ((il. (S,0)) .--> (halt S))
hence l = LastLoc ((il. (S,0)) .--> (halt S)) by ; :: thesis: verum
end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N;
let F be NAT -defined the InstructionsF of S -valued non empty finite Function;
attr F is halt-ending means :Def12: :: AMI_WSTD:def 12
F . () = halt S;
attr F is unique-halt means :Def13: :: AMI_WSTD:def 13
for f being Element of NAT st F . f = halt S & f in dom F holds
f = LastLoc F;
end;

:: deftheorem Def12 defines halt-ending AMI_WSTD:def 12 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite Function holds
( F is halt-ending iff F . () = halt S );

:: deftheorem Def13 defines unique-halt AMI_WSTD:def 13 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N
for F being NAT -defined the InstructionsF of b2 -valued non empty finite Function holds
( F is unique-halt iff for f being Element of NAT st F . f = halt S & f in dom F holds
f = LastLoc F );

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N;
existence
ex b1 being NAT -defined the InstructionsF of S -valued non empty finite lower Function st
( b1 is halt-ending & b1 is unique-halt & b1 is trivial )
proof end;
end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N;
existence
ex b1 being NAT -defined the InstructionsF of S -valued finite Function st
( b1 is trivial & b1 is really-closed & b1 is lower & not b1 is empty )
proof end;
end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N;
existence
ex b1 being NAT -defined the InstructionsF of S -valued non empty finite lower Function st
( b1 is halt-ending & b1 is unique-halt & b1 is trivial & b1 is really-closed )
proof end;
end;

definition end;

registration
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated halting weakly_standard AMI-Struct over N;
existence
ex b1 being pre-Macro of S st b1 is really-closed
proof end;
end;

theorem :: AMI_WSTD:33
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated AMI-Struct over N
for l1, l2 being Element of NAT st SUCC (l1,S) = NAT holds
l1 <= l2,S
proof end;

definition
let N be with_zero set ;
let S be non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N;
let loc be Element of NAT ;
let k be Nat;
func loc -' (k,S) -> Element of NAT equals :: AMI_WSTD:def 14
il. (S,((locnum (loc,S)) -' k));
coherence
il. (S,((locnum (loc,S)) -' k)) is Element of NAT
;
end;

:: deftheorem defines -' AMI_WSTD:def 14 :
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for loc being Element of NAT
for k being Nat holds loc -' (k,S) = il. (S,((locnum (loc,S)) -' k));

theorem :: AMI_WSTD:34
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l being Element of NAT holds l -' (0,S) = l by ;

theorem :: AMI_WSTD:35
for k being Nat
for N being with_zero set
for S being non empty with_non-empty_values IC-Ins-separated weakly_standard AMI-Struct over N
for l being Element of NAT holds (l + (k,S)) -' (k,S) = l
proof end;