Theorem op2ndd 6317

Description: Extract the second member of an ordered pair. (Contributed by Mario Carneiro, 31-Aug-2015.)

Hypotheses

Ref	Expression
op1st.1	⊢ 𝐴 ∈ V
op1st.2	⊢ 𝐵 ∈ V

Assertion

Ref	Expression
op2ndd	⊢ (𝐶 = ⟨𝐴, 𝐵⟩ → (2nd ‘𝐶) = 𝐵)

Proof of Theorem op2ndd

Step	Hyp	Ref	Expression
1		fveq2 5642	. 2 ⊢ (𝐶 = ⟨𝐴, 𝐵⟩ → (2nd ‘𝐶) = (2nd ‘⟨𝐴, 𝐵⟩))
2		op1st.1	. . 3 ⊢ 𝐴 ∈ V
3		op1st.2	. . 3 ⊢ 𝐵 ∈ V
4	2, 3	op2nd 6315	. 2 ⊢ (2nd ‘⟨𝐴, 𝐵⟩) = 𝐵
5	1, 4	eqtrdi 2279	1 ⊢ (𝐶 = ⟨𝐴, 𝐵⟩ → (2nd ‘𝐶) = 𝐵)

Syntax hints:   → wi 4   = wceq 1397   ∈ wcel 2201  Vcvv 2801  ⟨cop 3673  ‘cfv 5328  2^nd c2nd 6307

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2203  ax-14 2204  ax-ext 2212  ax-sep 4208  ax-pow 4266  ax-pr 4301  ax-un 4532

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514  df-rex 2515  df-v 2803  df-sbc 3031  df-un 3203  df-in 3205  df-ss 3212  df-pw 3655  df-sn 3676  df-pr 3677  df-op 3679  df-uni 3895  df-br 4090  df-opab 4152  df-mpt 4153  df-id 4392  df-xp 4733  df-rel 4734  df-cnv 4735  df-co 4736  df-dm 4737  df-rn 4738  df-iota 5288  df-fun 5330  df-fv 5336  df-2nd 6309

This theorem is referenced by:  xp2nd  6334  sbcopeq1a  6355  csbopeq1a  6356  eloprabi  6366  mpomptsx  6367  dmmpossx  6369  fmpox  6370  fmpoco  6386  df2nd2  6390  xporderlem  6401  xpf1o  7035  frecuzrdgtcl  10680  frecuzrdgfunlem  10687  fisumcom2  12022  fprodcom2fi  12210  txbas  15011  cnmpt2nd  15042  txhmeo  15072