Theorem funbrfv2b 5531

Description: Function value in terms of a binary relation. (Contributed by Mario Carneiro, 19-Mar-2014.)

Assertion

Ref	Expression
funbrfv2b	|- ( Fun F -> ( A F B <-> ( A e. dom F /\ ( F ` A ) = B ) ) )

Proof of Theorem funbrfv2b

Step	Hyp	Ref	Expression
1		funrel 5205	. . . 4 |- ( Fun F -> Rel F )
2		releldm 4839	. . . . 5 |- ( ( Rel F /\ A F B ) -> A e. dom F )
3	2	ex 114	. . . 4 |- ( Rel F -> ( A F B -> A e. dom F ) )
4	1, 3	syl 14	. . 3 |- ( Fun F -> ( A F B -> A e. dom F ) )
5	4	pm4.71rd 392	. 2 |- ( Fun F -> ( A F B <-> ( A e. dom F /\ A F B ) ) )
6		funbrfvb 5529	. . 3 |- ( ( Fun F /\ A e. dom F ) -> ( ( F ` A ) = B <-> A F B ) )
7	6	pm5.32da 448	. 2 |- ( Fun F -> ( ( A e. dom F /\ ( F ` A ) = B ) <-> ( A e. dom F /\ A F B ) ) )
8	5, 7	bitr4d 190	1 |- ( Fun F -> ( A F B <-> ( A e. dom F /\ ( F ` A ) = B ) ) )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1343   e. wcel 2136   class class class wbr 3982   dom cdm 4604   Rel wrel 4609   Fun wfun 5182   ` cfv 5188

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 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187

This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-iota 5153  df-fun 5190  df-fn 5191  df-fv 5196

This theorem is referenced by:  brtpos2  6219  xpcomco  6792