Theorem xpsnen2g 7080

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

Step	Hyp	Ref	Expression
1		snexg 4297	. . 3 |- ( A e. V -> { A } e. _V )
2		xpcomeng 7079	. . 3 |- ( ( { A } e. _V /\ B e. W ) -> ( { A } X. B ) ~~ ( B X. { A } ) )
3	1, 2	sylan 283	. 2 |- ( ( A e. V /\ B e. W ) -> ( { A } X. B ) ~~ ( B X. { A } ) )
4		xpsneng 7073	. . 3 |- ( ( B e. W /\ A e. V ) -> ( B X. { A } ) ~~ B )
5	4	ancoms 268	. 2 |- ( ( A e. V /\ B e. W ) -> ( B X. { A } ) ~~ B )
6		entr 7024	. 2 |- ( ( ( { A } X. B ) ~~ ( B X. { A } ) /\ ( B X. { A } ) ~~ B ) -> ( { A } X. B ) ~~ B )
7	3, 5, 6	syl2anc 411	1 |- ( ( A e. V /\ B e. W ) -> ( { A } X. B ) ~~ B )

Syntax hints:   -> wi 4   /\ wa 104   e. wcel 2203   _Vcvv 2813   {csn 3689   class class class wbr 4109   X. cxp 4747   ~~ cen 6973

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-sbc 3043  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-1st 6334  df-2nd 6335  df-er 6767  df-en 6976

This theorem is referenced by:  djucomen  7523  djuassen  7524  xpdjuen  7525  lgsquadlem1  15950  lgsquadlem2  15951