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Theorem fvopabf 2876
Description: The value of a function given by ordered pair abstraction.
Hypotheses
Ref Expression
fvopabf.1 (zA → ∀x zA)
fvopabf.2 (zC → ∀x zC)
fvopabf.3 AV
fvopabf.4 CV
fvopabf.5 (x = AB = C)
Assertion
Ref Expression
fvopabf ({⟨x, y⟩∣y = B} ‘A) = C
Distinct variable group(s):   z,A   y,B   z,C   x,y   x,z

Proof of Theorem fvopabf
StepHypRef Expression
1 fvopabf.3 . 2 AV
2 fvopabf.4 . 2 CV
3 fvopabf.1 . . 3 (zA → ∀x zA)
4 fvopabf.2 . . 3 (zC → ∀x zC)
5 fvopabf.5 . . 3 (x = AB = C)
63, 4, 5fvopabgf 2874 . 2 ((AVCV) → ({⟨x, y⟩∣y = B} ‘A) = C)
71, 2, 6mp2an 520 1 ({⟨x, y⟩∣y = B} ‘A) = C
Colors of variables: wff set class
Syntax hints:   → wi 2  ∀wal 672   = wceq 1091   ∈ wcel 1092  Vcvv 1348  {copab 2055   ‘cfv 2422
This theorem is referenced by:  fvopab 2877  seqlem1 4662
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-eu 1009  df-mo 1010  df-clab 1093  df-cleq 1097  df-clel 1099  df-rex 1206  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-uni 1920  df-br 2063  df-opab 2098  df-id 2125  df-xp 2424  df-rel 2425  df-cnv 2426  df-co 2427  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431  df-fun 2432  df-fv 2438
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