Theorem fnmpti 5458

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 ∈ V
fnmpti.2	⊢ 𝐹 = (𝑥 ∈ 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 ∈ V
2	1	rgenw 2585	. 2 ⊢ ∀𝑥 ∈ 𝐴 𝐵 ∈ V
3		fnmpti.2	. . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐴 ↦ 𝐵)
4	3	mptfng 5455	. 2 ⊢ (∀𝑥 ∈ 𝐴 𝐵 ∈ V ↔ 𝐹 Fn 𝐴)
5	2, 4	mpbi 145	1 ⊢ 𝐹 Fn 𝐴

Syntax hints:   = wceq 1395   ∈ wcel 2200  ∀wral 2508  Vcvv 2800   ↦ cmpt 4148   Fn wfn 5319

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2802  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-br 4087  df-opab 4149  df-mpt 4150  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-fun 5326  df-fn 5327

This theorem is referenced by:  dmmpti  5459  fconst  5529  eufnfv  5880  idref  5892  fo1st  6315  fo2nd  6316  reldm  6344  oafnex  6607  fnoei  6615  oeiexg  6616  mapsnf1o2  6860  nninfctlemfo  12601  1arith  12930  slotslfn  13098  topnfn  13317  fn0g  13448  fnmgp  13925  rlmfn  14457  blfn  14555  fncld  14812  xmetunirn  15072  nnnninfex  16560  nninfnfiinf  16561