Theorem 1st2nd2 6233

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 e. ( B X. C ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )

Proof of Theorem 1st2nd2

Step	Hyp	Ref	Expression
1		elxp6 6227	. 2 |- ( A e. ( B X. C ) <-> ( A = <. ( 1st ` A ) , ( 2nd ` A ) >. /\ ( ( 1st ` A ) e. B /\ ( 2nd ` A ) e. C ) ) )
2	1	simplbi 274	1 |- ( A e. ( B X. C ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1364   e. wcel 2167   <.cop 3625   X. cxp 4661   ` cfv 5258   1stc1st 6196   2ndc2nd 6197

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 4151  ax-pow 4207  ax-pr 4242  ax-un 4468

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 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-iota 5219  df-fun 5260  df-fv 5266  df-1st 6198  df-2nd 6199

This theorem is referenced by:  xpopth  6234  eqop  6235  2nd1st  6238  1st2nd  6239  xpmapenlem  6910  opabfi  6999  djuf1olem  7119  exmidapne  7327  dfplpq2  7421  dfmpq2  7422  enqbreq2  7424  enqdc1  7429  preqlu  7539  prop  7542  elnp1st2nd  7543  cauappcvgprlemladd  7725  elreal2  7897  cnref1o  9725  frecuzrdgrrn  10500  frec2uzrdg  10501  frecuzrdgrcl  10502  frecuzrdgsuc  10506  frecuzrdgrclt  10507  frecuzrdgg  10508  frecuzrdgdomlem  10509  frecuzrdgfunlem  10511  frecuzrdgsuctlem  10515  seq3val  10552  seqvalcd  10553  eucalgval  12222  eucalginv  12224  eucalglt  12225  eucalg  12227  sqpweven  12343  2sqpwodd  12344  qnumdenbi  12360  xpsff1o  12992  tx1cn  14505  tx2cn  14506  txdis  14513  psmetxrge0  14568  xmetxpbl  14744