Theorem 1st2nd2 6413

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 6407	. 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 ) >. )

This proof depends on syntax axioms:   -> wi 4   /\ wa 104   = wceq 1402   e. wcel 2209   <.cop 3712   X. cxp 4774   ` cfv 5380   1stc1st 6376   2ndc2nd 6377

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-un 4580

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-iota 5340  df-fun 5382  df-fv 5388  df-1st 6378  df-2nd 6379

This theorem is used by:  xpopth  6414  eqop  6415  2nd1st  6418  1st2nd  6419  xpmapenlem  7153  mapunen  7155  opabfi  7251  djuf1olem  7399  exmidapne  7632  dfplpq2  7727  dfmpq2  7728  enqbreq2  7730  enqdc1  7735  preqlu  7845  prop  7848  elnp1st2nd  7849  cauappcvgprlemladd  8031  elreal2  8203  cnref1o  10068  frecuzrdgrrn  10866  frec2uzrdg  10867  frecuzrdgrcl  10868  frecuzrdgsuc  10872  frecuzrdgrclt  10873  frecuzrdgg  10874  frecuzrdgdomlem  10875  frecuzrdgfunlem  10877  frecuzrdgsuctlem  10881  seq3val  10918  seqvalcd  10919  eucalgval  12857  eucalginv  12859  eucalglt  12860  eucalg  12862  sqpweven  12980  2sqpwodd  12981  qnumdenbi  12997  xpsff1o  13729  gsum2dfilem2  14272  tx1cn  15495  tx2cn  15496  txdis  15503  psmetxrge0  15558  xmetxpbl  15734  idjudju  17252