Theorem xpsnen2g 7012

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 4274	. . 3 |- ( A e. V -> { A } e. _V )
2		xpcomeng 7011	. . 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 7005	. . 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 6957	. 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 2202   _Vcvv 2802   {csn 3669   class class class wbr 4088   X. cxp 4723   ~~ cen 6906

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-1st 6302  df-2nd 6303  df-er 6701  df-en 6909

This theorem is referenced by:  djucomen  7430  djuassen  7431  xpdjuen  7432  lgsquadlem1  15805  lgsquadlem2  15806