Theorem f1oeq1 5060

Description: Equality theorem for one-to-one onto functions. (Contributed by NM, 10-Feb-1997.)

Assertion

Ref	Expression
f1oeq1	|- ( F = G -> ( F :A -1-1-onto->B <-> G :A -1-1-onto->B))

Proof of Theorem f1oeq1

Step	Hyp	Ref	Expression
1		f1eq1 5030	. . 3 |- ( F = G -> ( F :A -1-1->B <-> G :A -1-1->B))
2		foeq1 5045	. . 3 |- ( F = G -> ( F :A -onto->B <-> G :A -onto->B))
3	1, 2	anbi12d 442	. 2 |- ( F = G -> (( F :A -1-1->B /\ F :A -onto->B) <-> ( G :A -1-1->B /\ G :A -onto->B)))
4		df-f1o 4852	. 2 |- ( F :A -1-1-onto->B <-> ( F :A -1-1->B /\ F :A -onto->B))
5		df-f1o 4852	. 2 |- ( G :A -1-1-onto->B <-> ( G :A -1-1->B /\ G :A -onto->B))
6	3, 4, 5	3bitr4g 212	1 |- ( F = G -> ( F :A -1-1-onto->B <-> G :A -1-1-onto->B))

Syntax hints:   -> wi 4   /\ wa 97   <-> wb 98   = wceq 1242   -1-1->wf1 4842   -onto->wfo 4843   -1-1-onto->wf1o 4844

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 629  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-10 1393  ax-11 1394  ax-i12 1395  ax-bndl 1396  ax-4 1397  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019

This theorem depends on definitions:  df-bi 110  df-3an 886  df-tru 1245  df-nf 1347  df-sb 1643  df-clab 2024  df-cleq 2030  df-clel 2033  df-nfc 2164  df-v 2553  df-un 2916  df-in 2918  df-ss 2925  df-sn 3373  df-pr 3374  df-op 3376  df-br 3756  df-opab 3810  df-rel 4295  df-cnv 4296  df-co 4297  df-dm 4298  df-rn 4299  df-fun 4847  df-fn 4848  df-f 4849  df-f1 4850  df-fo 4851  df-f1o 4852

This theorem is referenced by:  f1oeq123d  5066  f1ocnvb  5083  f1orescnv  5085  f1ovi  5108  f1osng  5110  f1oresrab  5272  fsn  5278  isoeq1  5384  f1oen3g  6170  ensn1  6212  xpcomf1o  6235