Theorem 1st2nd2 6321

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 6315	. 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 1395   e. wcel 2200   <.cop 3669   X. cxp 4717   ` cfv 5318   1stc1st 6284   2ndc2nd 6285

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 6286  df-2nd 6287

This theorem is referenced by:  xpopth  6322  eqop  6323  2nd1st  6326  1st2nd  6327  xpmapenlem  7010  opabfi  7100  djuf1olem  7220  exmidapne  7446  dfplpq2  7541  dfmpq2  7542  enqbreq2  7544  enqdc1  7549  preqlu  7659  prop  7662  elnp1st2nd  7663  cauappcvgprlemladd  7845  elreal2  8017  cnref1o  9846  frecuzrdgrrn  10630  frec2uzrdg  10631  frecuzrdgrcl  10632  frecuzrdgsuc  10636  frecuzrdgrclt  10637  frecuzrdgg  10638  frecuzrdgdomlem  10639  frecuzrdgfunlem  10641  frecuzrdgsuctlem  10645  seq3val  10682  seqvalcd  10683  eucalgval  12576  eucalginv  12578  eucalglt  12579  eucalg  12581  sqpweven  12697  2sqpwodd  12698  qnumdenbi  12714  xpsff1o  13382  tx1cn  14943  tx2cn  14944  txdis  14951  psmetxrge0  15006  xmetxpbl  15182