Theorem 1st2nd2 6073

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 6067	. 2 |- ( A e. ( B X. C ) <-> ( A = <. ( 1st ` A ) , ( 2nd ` A ) >. /\ ( ( 1st ` A ) e. B /\ ( 2nd ` A ) e. C ) ) )
2	1	simplbi 272	1 |- ( A e. ( B X. C ) -> A = <. ( 1st ` A ) , ( 2nd ` A ) >. )

Syntax hints:   -> wi 4   /\ wa 103   = wceq 1331   e. wcel 1480   <.cop 3530   X. cxp 4537   ` cfv 5123   1stc1st 6036   2ndc2nd 6037

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-sep 4046  ax-pow 4098  ax-pr 4131  ax-un 4355

This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2002  df-mo 2003  df-clab 2126  df-cleq 2132  df-clel 2135  df-nfc 2270  df-ral 2421  df-rex 2422  df-v 2688  df-sbc 2910  df-un 3075  df-in 3077  df-ss 3084  df-pw 3512  df-sn 3533  df-pr 3534  df-op 3536  df-uni 3737  df-br 3930  df-opab 3990  df-mpt 3991  df-id 4215  df-xp 4545  df-rel 4546  df-cnv 4547  df-co 4548  df-dm 4549  df-rn 4550  df-iota 5088  df-fun 5125  df-fv 5131  df-1st 6038  df-2nd 6039

This theorem is referenced by:  xpopth  6074  eqop  6075  2nd1st  6078  1st2nd  6079  xpmapenlem  6743  djuf1olem  6938  dfplpq2  7162  dfmpq2  7163  enqbreq2  7165  enqdc1  7170  preqlu  7280  prop  7283  elnp1st2nd  7284  cauappcvgprlemladd  7466  elreal2  7638  cnref1o  9440  frecuzrdgrrn  10181  frec2uzrdg  10182  frecuzrdgrcl  10183  frecuzrdgsuc  10187  frecuzrdgrclt  10188  frecuzrdgg  10189  frecuzrdgdomlem  10190  frecuzrdgfunlem  10192  frecuzrdgsuctlem  10196  seq3val  10231  seqvalcd  10232  eucalgval  11735  eucalginv  11737  eucalglt  11738  eucalg  11740  sqpweven  11853  2sqpwodd  11854  qnumdenbi  11870  tx1cn  12438  tx2cn  12439  txdis  12446  psmetxrge0  12501  xmetxpbl  12677