Theorem xpcanm 5069

Description: Cancellation law for cross-product. (Contributed by Jim Kingdon, 14-Dec-2018.)

Assertion

Ref	Expression
xpcanm	|- ( E. x x e. C -> ( ( C X. A ) = ( C X. B ) <-> A = B ) )

Distinct variable group:   x, C

Allowed substitution hints:   A( x)   B( x)

Proof of Theorem xpcanm

Step	Hyp	Ref	Expression
1		ssxp2 5067	. . 3 |- ( E. x x e. C -> ( ( C X. A ) C_ ( C X. B ) <-> A C_ B ) )
2		ssxp2 5067	. . 3 |- ( E. x x e. C -> ( ( C X. B ) C_ ( C X. A ) <-> B C_ A ) )
3	1, 2	anbi12d 473	. 2 |- ( E. x x e. C -> ( ( ( C X. A ) C_ ( C X. B ) /\ ( C X. B ) C_ ( C X. A ) ) <-> ( A C_ B /\ B C_ A ) ) )
4		eqss 3171	. 2 |- ( ( C X. A ) = ( C X. B ) <-> ( ( C X. A ) C_ ( C X. B ) /\ ( C X. B ) C_ ( C X. A ) ) )
5		eqss 3171	. 2 |- ( A = B <-> ( A C_ B /\ B C_ A ) )
6	3, 4, 5	3bitr4g 223	1 |- ( E. x x e. C -> ( ( C X. A ) = ( C X. B ) <-> A = B ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1353   E.wex 1492   e. wcel 2148   C_ wss 3130   X. cxp 4625

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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4122  ax-pow 4175  ax-pr 4210

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2740  df-un 3134  df-in 3136  df-ss 3143  df-pw 3578  df-sn 3599  df-pr 3600  df-op 3602  df-br 4005  df-opab 4066  df-xp 4633  df-rel 4634  df-cnv 4635  df-dm 4637  df-rn 4638

This theorem is referenced by: (None)