Theorem op2ndd 6128

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 5496	. 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 6126	. 2 ⊢ (2nd ‘⟨𝐴, 𝐵⟩) = 𝐵
5	1, 4	eqtrdi 2219	1 ⊢ (𝐶 = ⟨𝐴, 𝐵⟩ → (2nd ‘𝐶) = 𝐵)

Syntax hints:   → wi 4   = wceq 1348   ∈ wcel 2141  Vcvv 2730  ⟨cop 3586  ‘cfv 5198  2^nd c2nd 6118

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-v 2732  df-sbc 2956  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-iota 5160  df-fun 5200  df-fv 5206  df-2nd 6120

This theorem is referenced by:  xp2nd  6145  sbcopeq1a  6166  csbopeq1a  6167  eloprabi  6175  mpomptsx  6176  dmmpossx  6178  fmpox  6179  fmpoco  6195  df2nd2  6199  xporderlem  6210  xpf1o  6822  frecuzrdgtcl  10368  frecuzrdgfunlem  10375  fisumcom2  11401  fprodcom2fi  11589  txbas  13052  cnmpt2nd  13083  txhmeo  13113