Theorem foov 6203

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 5826	. 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 5672	. . . . . . 7 |- ( w = <. x , y >. -> ( F ` w ) = ( F ` <. x , y >. ) )
3		df-ov 6055	. . . . . . 7 |- ( x F y ) = ( F ` <. x , y >. )
4	2, 3	eqtr4di 2285	. . . . . 6 |- ( w = <. x , y >. -> ( F ` w ) = ( x F y ) )
5	4	eqeq2d 2246	. . . . 5 |- ( w = <. x , y >. -> ( z = ( F ` w ) <-> z = ( x F y ) ) )
6	5	rexxp 4901	. . . 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 2550	. . 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 457	. 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 184	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 104   <-> wb 105   = wceq 1398   A.wral 2522   E.wrex 2523   <.cop 3694   X. cxp 4749   -->wf 5350   -onto->wfo 5352   ` cfv 5354  (class class class)co 6052

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-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-csb 3141  df-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-fo 5360  df-fv 5362  df-ov 6055

This theorem is referenced by:  xpsff1o  13579  mndpfo  13668