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Theorem f1eq123d 6816
Description: Equality deduction for one-to-one functions. (Contributed by Mario Carneiro, 27-Jan-2017.)
Hypotheses
Ref Expression
f1eq123d.1 (𝜑 → 𝐹 = 𝐺)
f1eq123d.2 (𝜑 → 𝐴 = 𝐵)
f1eq123d.3 (𝜑 → 𝐶 = 𝐷)
Assertion
Ref Expression
f1eq123d (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷))

Proof of Theorem f1eq123d
StepHypRef Expression
1 f1eq123d.1 . . 3 (𝜑 → 𝐹 = 𝐺)
2 f1eq1 6773 . . 3 (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐴–1-1→𝐶))
31, 2syl 18 . 2 (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐴–1-1→𝐶))
4 f1eq123d.2 . . 3 (𝜑 → 𝐴 = 𝐵)
5 f1eq2 6774 . . 3 (𝐴 = 𝐵 → (𝐺:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐶))
64, 5syl 18 . 2 (𝜑 → (𝐺:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐶))
7 f1eq123d.3 . . 3 (𝜑 → 𝐶 = 𝐷)
8 f1eq3 6775 . . 3 (𝐶 = 𝐷 → (𝐺:𝐵–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷))
97, 8syl 18 . 2 (𝜑 → (𝐺:𝐵–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷))
103, 6, 93bitrd 308 1 (𝜑 → (𝐹:𝐴–1-1→𝐶 ↔ 𝐺:𝐵–1-1→𝐷))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   = wceq 1569  –1-1→wf1 6535
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-un 4151  df-nul 4279  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-br 5103  df-opab 5167  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543
This theorem is used by:  f10d  6859  f1resfz0f1d  13930  s1f1  14760  fthf1  18099  cofth  18117  rngqiprngimf1  21601  istrkgld  28926  istrkg2ld  28927  isushgr  29644  isuspgr  29738  isusgr  29739  isuspgrop  29747  isusgrop  29748  ausgrusgrb  29751  ausgrusgri  29754  usgrstrrepe  29821  uspgr1e  29830  usgrres1  29901  usgrexi  30027  uspgr2wlkeq  30231  usgr2trlncl  30351  aciunf1  33304  pfxf1  33555  tocycfv  33716  tocycf  33724  tocyc01  33725  cycpmco2f1  33731  cycpmco2rn  33732  cycpmco2lem1  33733  cycpmco2lem2  33734  cycpmco2lem3  33735  cycpmco2lem4  33736  cycpmco2lem5  33737  cycpmco2lem6  33738  cycpmco2lem7  33739  cycpmco2  33740  cycpm3cl2  33743  cycpmconjv  33749  tocyccntz  33751  cyc3evpm  33757  cycpmgcl  33760  cycpmconjslem2  33762  cyc3conja  33764  dimkerim  34305  aks6d1c2  43273  f1cof1b  48240  fundcmpsurinjALT  48587  upgrimtrls  49097  stgrusgra  49150  gpgusgra  49248  cofidf2  50329
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