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Theorem xpsnen2g 6795
Description: A set is equinumerous to its Cartesian product with a singleton on the left. (Contributed by Stefan O'Rear, 21-Nov-2014.)
Assertion
Ref Expression
xpsnen2g  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( { A }  X.  B )  ~~  B
)

Proof of Theorem xpsnen2g
StepHypRef Expression
1 snexg 4163 . . 3  |-  ( A  e.  V  ->  { A }  e.  _V )
2 xpcomeng 6794 . . 3  |-  ( ( { A }  e.  _V  /\  B  e.  W
)  ->  ( { A }  X.  B
)  ~~  ( B  X.  { A } ) )
31, 2sylan 281 . 2  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( { A }  X.  B )  ~~  ( B  X.  { A }
) )
4 xpsneng 6788 . . 3  |-  ( ( B  e.  W  /\  A  e.  V )  ->  ( B  X.  { A } )  ~~  B
)
54ancoms 266 . 2  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( B  X.  { A } )  ~~  B
)
6 entr 6750 . 2  |-  ( ( ( { A }  X.  B )  ~~  ( B  X.  { A }
)  /\  ( B  X.  { A } ) 
~~  B )  -> 
( { A }  X.  B )  ~~  B
)
73, 5, 6syl2anc 409 1  |-  ( ( A  e.  V  /\  B  e.  W )  ->  ( { A }  X.  B )  ~~  B
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    e. wcel 2136   _Vcvv 2726   {csn 3576   class class class wbr 3982    X. cxp 4602    ~~ cen 6704
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 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187  ax-un 4411
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-int 3825  df-br 3983  df-opab 4044  df-mpt 4045  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-1st 6108  df-2nd 6109  df-er 6501  df-en 6707
This theorem is referenced by:  djucomen  7172  djuassen  7173  xpdjuen  7174
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