Theorem foov 5647

Description: An onto mapping of an operation expressed in terms of operation values. (Contributed by NM, 29-Oct-2006.)

Assertion

Ref	Expression
foov	|- ( F : ( A X. B ) -onto-> C <-> ( F : ( A X. B ) --> C /\ A. z e. C E. x e. A E. y e. B z = ( x F y ) ) )

Distinct variable groups:   x, y, z, A   x, B, y, z   z, C   x, F, y, z

Allowed substitution hints:   C( x, y)

Proof of Theorem foov

Dummy variable w is distinct from all other variables.

Step	Hyp	Ref	Expression
1		dffo3 5314	. 2 |- ( F : ( A X. B ) -onto-> C <-> ( F : ( A X. B ) --> C /\ A. z e. C E. w e. ( A X. B ) z = ( F ` w ) ) )
2		fveq2 5178	. . . . . . 7 |- ( w = <. x , y >. -> ( F ` w ) = ( F ` <. x , y >. ) )
3		df-ov 5515	. . . . . . 7 |- ( x F y ) = ( F ` <. x , y >. )
4	2, 3	syl6eqr 2090	. . . . . 6 |- ( w = <. x , y >. -> ( F ` w ) = ( x F y ) )
5	4	eqeq2d 2051	. . . . 5 |- ( w = <. x , y >. -> ( z = ( F ` w ) <-> z = ( x F y ) ) )
6	5	rexxp 4480	. . . 4 |- ( E. w e. ( A X. B ) z = ( F ` w ) <-> E. x e. A E. y e. B z = ( x F y ) )
7	6	ralbii 2330	. . 3 |- ( A. z e. C E. w e. ( A X. B ) z = ( F ` w ) <-> A. z e. C E. x e. A E. y e. B z = ( x F y ) )
8	7	anbi2i 430	. 2 |- ( ( F : ( A X. B ) --> C /\ A. z e. C E. w e. ( A X. B ) z = ( F ` w ) ) <-> ( F : ( A X. B ) --> C /\ A. z e. C E. x e. A E. y e. B z = ( x F y ) ) )
9	1, 8	bitri 173	1 |- ( F : ( A X. B ) -onto-> C <-> ( F : ( A X. B ) --> C /\ A. z e. C E. x e. A E. y e. B z = ( x F y ) ) )

Syntax hints:   /\ wa 97   <-> wb 98   = wceq 1243   A.wral 2306   E.wrex 2307   <.cop 3378   X. cxp 4343   -->wf 4898   -onto->wfo 4900   ` cfv 4902  (class class class)co 5512

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-14 1405  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022  ax-sep 3875  ax-pow 3927  ax-pr 3944

This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-eu 1903  df-mo 1904  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-ral 2311  df-rex 2312  df-v 2559  df-sbc 2765  df-csb 2853  df-un 2922  df-in 2924  df-ss 2931  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  df-uni 3581  df-iun 3659  df-br 3765  df-opab 3819  df-mpt 3820  df-id 4030  df-xp 4351  df-rel 4352  df-cnv 4353  df-co 4354  df-dm 4355  df-rn 4356  df-iota 4867  df-fun 4904  df-fn 4905  df-f 4906  df-fo 4908  df-fv 4910  df-ov 5515

This theorem is referenced by: (None)