Theorem 1st2nd2 6242

Description: Reconstruction of a member of a cross product in terms of its ordered pair components. (Contributed by NM, 20-Oct-2013.)

Assertion

Ref	Expression
1st2nd2	⊢ (𝐴 ∈ (𝐵 × 𝐶) → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩)

Proof of Theorem 1st2nd2

Step	Hyp	Ref	Expression
1		elxp6 6236	. 2 ⊢ (𝐴 ∈ (𝐵 × 𝐶) ↔ (𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩ ∧ ((1st ‘𝐴) ∈ 𝐵 ∧ (2nd ‘𝐴) ∈ 𝐶)))
2	1	simplbi 274	1 ⊢ (𝐴 ∈ (𝐵 × 𝐶) → 𝐴 = ⟨(1st ‘𝐴), (2nd ‘𝐴)⟩)

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1364   ∈ wcel 2167  ⟨cop 3626   × cxp 4662  ‘cfv 5259  1^st c1st 6205  2^nd c2nd 6206

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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-v 2765  df-sbc 2990  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-iota 5220  df-fun 5261  df-fv 5267  df-1st 6207  df-2nd 6208

This theorem is referenced by:  xpopth  6243  eqop  6244  2nd1st  6247  1st2nd  6248  xpmapenlem  6919  opabfi  7008  djuf1olem  7128  exmidapne  7343  dfplpq2  7438  dfmpq2  7439  enqbreq2  7441  enqdc1  7446  preqlu  7556  prop  7559  elnp1st2nd  7560  cauappcvgprlemladd  7742  elreal2  7914  cnref1o  9742  frecuzrdgrrn  10517  frec2uzrdg  10518  frecuzrdgrcl  10519  frecuzrdgsuc  10523  frecuzrdgrclt  10524  frecuzrdgg  10525  frecuzrdgdomlem  10526  frecuzrdgfunlem  10528  frecuzrdgsuctlem  10532  seq3val  10569  seqvalcd  10570  eucalgval  12247  eucalginv  12249  eucalglt  12250  eucalg  12252  sqpweven  12368  2sqpwodd  12369  qnumdenbi  12385  xpsff1o  13051  tx1cn  14589  tx2cn  14590  txdis  14597  psmetxrge0  14652  xmetxpbl  14828