Theorem foov 6003

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 5647	. 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 5499	. . . . . . 7 |- ( w = <. x , y >. -> ( F ` w ) = ( F ` <. x , y >. ) )
3		df-ov 5860	. . . . . . 7 |- ( x F y ) = ( F ` <. x , y >. )
4	2, 3	eqtr4di 2222	. . . . . 6 |- ( w = <. x , y >. -> ( F ` w ) = ( x F y ) )
5	4	eqeq2d 2183	. . . . 5 |- ( w = <. x , y >. -> ( z = ( F ` w ) <-> z = ( x F y ) ) )
6	5	rexxp 4756	. . . 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 2477	. . 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 455	. 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 183	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 103   <-> wb 104   = wceq 1349   A.wral 2449   E.wrex 2450   <.cop 3587   X. cxp 4610   -->wf 5196   -onto->wfo 5198   ` cfv 5200  (class class class)co 5857

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 705  ax-5 1441  ax-7 1442  ax-gen 1443  ax-ie1 1487  ax-ie2 1488  ax-8 1498  ax-10 1499  ax-11 1500  ax-i12 1501  ax-bndl 1503  ax-4 1504  ax-17 1520  ax-i9 1524  ax-ial 1528  ax-i5r 1529  ax-14 2145  ax-ext 2153  ax-sep 4108  ax-pow 4161  ax-pr 4195

This theorem depends on definitions:  df-bi 116  df-3an 976  df-tru 1352  df-nf 1455  df-sb 1757  df-eu 2023  df-mo 2024  df-clab 2158  df-cleq 2164  df-clel 2167  df-nfc 2302  df-ral 2454  df-rex 2455  df-v 2733  df-sbc 2957  df-csb 3051  df-un 3126  df-in 3128  df-ss 3135  df-pw 3569  df-sn 3590  df-pr 3591  df-op 3593  df-uni 3798  df-iun 3876  df-br 3991  df-opab 4052  df-mpt 4053  df-id 4279  df-xp 4618  df-rel 4619  df-cnv 4620  df-co 4621  df-dm 4622  df-rn 4623  df-iota 5162  df-fun 5202  df-fn 5203  df-f 5204  df-fo 5206  df-fv 5208  df-ov 5860

This theorem is referenced by:  mndpfo  12678