Theorem 1st2nd2 6327

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 6321	. 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 1395   ∈ wcel 2200  ⟨cop 3669   × cxp 4717  ‘cfv 5318  1^st c1st 6290  2^nd c2nd 6291

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-sbc 3029  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-iota 5278  df-fun 5320  df-fv 5326  df-1st 6292  df-2nd 6293

This theorem is referenced by:  xpopth  6328  eqop  6329  2nd1st  6332  1st2nd  6333  xpmapenlem  7018  opabfi  7111  djuf1olem  7231  exmidapne  7457  dfplpq2  7552  dfmpq2  7553  enqbreq2  7555  enqdc1  7560  preqlu  7670  prop  7673  elnp1st2nd  7674  cauappcvgprlemladd  7856  elreal2  8028  cnref1o  9858  frecuzrdgrrn  10642  frec2uzrdg  10643  frecuzrdgrcl  10644  frecuzrdgsuc  10648  frecuzrdgrclt  10649  frecuzrdgg  10650  frecuzrdgdomlem  10651  frecuzrdgfunlem  10653  frecuzrdgsuctlem  10657  seq3val  10694  seqvalcd  10695  eucalgval  12591  eucalginv  12593  eucalglt  12594  eucalg  12596  sqpweven  12712  2sqpwodd  12713  qnumdenbi  12729  xpsff1o  13397  tx1cn  14958  tx2cn  14959  txdis  14966  psmetxrge0  15021  xmetxpbl  15197