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Theorem xpsn 5811
Description: The cross product of two singletons. (Contributed by NM, 4-Nov-2006.)
Hypotheses
Ref Expression
xpsn.1  |-  A  e. 
_V
xpsn.2  |-  B  e. 
_V
Assertion
Ref Expression
xpsn  |-  ( { A }  X.  { B } )  =  { <. A ,  B >. }

Proof of Theorem xpsn
StepHypRef Expression
1 xpsn.1 . 2  |-  A  e. 
_V
2 xpsn.2 . 2  |-  B  e. 
_V
3 xpsng 5810 . 2  |-  ( ( A  e.  _V  /\  B  e.  _V )  ->  ( { A }  X.  { B } )  =  { <. A ,  B >. } )
41, 2, 3mp2an 426 1  |-  ( { A }  X.  { B } )  =  { <. A ,  B >. }
Colors of variables: wff set class
Syntax hints:    = wceq 1395    e. wcel 2200   _Vcvv 2799   {csn 3666   <.cop 3669    X. cxp 4717
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-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293
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-reu 2515  df-v 2801  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  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-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325
This theorem is referenced by:  dfmpt  5812  ixpsnf1o  6883  txdis  14951
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