Theorem fnmpti 5027

Description: Functionality and domain of an ordered-pair class abstraction. (Contributed by NM, 29-Jan-2004.) (Revised by Mario Carneiro, 31-Aug-2015.)

Hypotheses

Ref	Expression
fnmpti.1	|- B e. _V
fnmpti.2	|- F = ( x e. A |-> B )

Assertion

Ref	Expression
fnmpti	|- F Fn A

Distinct variable group:   x, A

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

Proof of Theorem fnmpti

Step	Hyp	Ref	Expression
1		fnmpti.1	. . 3 |- B e. _V
2	1	rgenw 2376	. 2 |- A. x e. A B e. _V
3		fnmpti.2	. . 3 |- F = ( x e. A |-> B )
4	3	mptfng 5024	. 2 |- ( A. x e. A B e. _V <-> F Fn A )
5	2, 4	mpbi 133	1 |- F Fn A

Syntax hints:   = wceq 1243   e. wcel 1393   A.wral 2306   _Vcvv 2557   |-> cmpt 3818   Fn wfn 4897

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-un 2922  df-in 2924  df-ss 2931  df-pw 3361  df-sn 3381  df-pr 3382  df-op 3384  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-fun 4904  df-fn 4905

This theorem is referenced by:  dmmpti  5028  fconst  5082  eufnfv  5389  idref  5396  fo1st  5784  fo2nd  5785  reldm  5812  oafnex  6024  fnoei  6032  oeiexg  6033