let a, b be Real; :: thesis: ( a < b implies ( L[01] (((a,b) (#)),((#) (a,b))) is being_homeomorphism & (L[01] (((a,b) (#)),((#) (a,b)))) " = P[01] (a,b,((0,1) (#)),((#) (0,1))) & P[01] (a,b,((0,1) (#)),((#) (0,1))) is being_homeomorphism & (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b))) ) )
set L = L[01] (((a,b) (#)),((#) (a,b)));
set P = P[01] (a,b,((0,1) (#)),((#) (0,1)));
assume A1: a < b ; :: thesis: ( L[01] (((a,b) (#)),((#) (a,b))) is being_homeomorphism & (L[01] (((a,b) (#)),((#) (a,b)))) " = P[01] (a,b,((0,1) (#)),((#) (0,1))) & P[01] (a,b,((0,1) (#)),((#) (0,1))) is being_homeomorphism & (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b))) )
then A2: id the carrier of (Closed-Interval-TSpace (0,1)) = (P[01] (a,b,((0,1) (#)),((#) (0,1)))) * (L[01] (((a,b) (#)),((#) (a,b)))) by Th16;
then A3: L[01] (((a,b) (#)),((#) (a,b))) is one-to-one by FUNCT_2:23;
A4: ( L[01] (((a,b) (#)),((#) (a,b))) is continuous & P[01] (a,b,((0,1) (#)),((#) (0,1))) is continuous Function of (Closed-Interval-TSpace (a,b)),(Closed-Interval-TSpace (0,1)) ) by A1, Th8, Th12;
A5: id the carrier of (Closed-Interval-TSpace (a,b)) = id (Closed-Interval-TSpace (a,b))
.= (L[01] (((a,b) (#)),((#) (a,b)))) * (P[01] (a,b,((0,1) (#)),((#) (0,1)))) by A1, Th16 ;
then A6: L[01] (((a,b) (#)),((#) (a,b))) is onto by FUNCT_2:23;
then A7: rng (L[01] (((a,b) (#)),((#) (a,b)))) = [#] (Closed-Interval-TSpace (a,b)) ;
A8: (L[01] (((a,b) (#)),((#) (a,b)))) " = (L[01] (((a,b) (#)),((#) (a,b)))) " by A3, A6, TOPS_2:def 4;
( dom (L[01] (((a,b) (#)),((#) (a,b)))) = [#] (Closed-Interval-TSpace (0,1)) & P[01] (a,b,((0,1) (#)),((#) (0,1))) = (L[01] (((a,b) (#)),((#) (a,b)))) " ) by A2, A3, A7, FUNCT_2:30, FUNCT_2:def 1;
hence L[01] (((a,b) (#)),((#) (a,b))) is being_homeomorphism by A3, A7, A8, A4, TOPS_2:def 5; :: thesis: ( (L[01] (((a,b) (#)),((#) (a,b)))) " = P[01] (a,b,((0,1) (#)),((#) (0,1))) & P[01] (a,b,((0,1) (#)),((#) (0,1))) is being_homeomorphism & (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b))) )
thus (L[01] (((a,b) (#)),((#) (a,b)))) " = P[01] (a,b,((0,1) (#)),((#) (0,1))) by A2, A3, A7, A8, FUNCT_2:30; :: thesis: ( P[01] (a,b,((0,1) (#)),((#) (0,1))) is being_homeomorphism & (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b))) )
A9: P[01] (a,b,((0,1) (#)),((#) (0,1))) is onto by A2, FUNCT_2:23;
then A10: rng (P[01] (a,b,((0,1) (#)),((#) (0,1)))) = [#] (Closed-Interval-TSpace (0,1)) ;
A11: ( L[01] (((a,b) (#)),((#) (a,b))) is continuous Function of (Closed-Interval-TSpace (0,1)),(Closed-Interval-TSpace (a,b)) & P[01] (a,b,((0,1) (#)),((#) (0,1))) is continuous ) by A1, Th8, Th12;
A12: P[01] (a,b,((0,1) (#)),((#) (0,1))) is one-to-one by A5, FUNCT_2:23;
A13: (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " by A12, A9, TOPS_2:def 4;
( dom (P[01] (a,b,((0,1) (#)),((#) (0,1)))) = [#] (Closed-Interval-TSpace (a,b)) & L[01] (((a,b) (#)),((#) (a,b))) = (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " ) by A10, A5, A12, FUNCT_2:30, FUNCT_2:def 1;
hence P[01] (a,b,((0,1) (#)),((#) (0,1))) is being_homeomorphism by A10, A12, A13, A11, TOPS_2:def 5; :: thesis: (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b)))
thus (P[01] (a,b,((0,1) (#)),((#) (0,1)))) " = L[01] (((a,b) (#)),((#) (a,b))) by A10, A5, A12, A13, FUNCT_2:30; :: thesis: verum