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Theorem fnmpo 6193
Description: Functionality and domain of a class given by the maps-to notation. (Contributed by FL, 17-May-2010.)
Hypothesis
Ref Expression
fmpo.1 𝐹 = (𝑥𝐴, 𝑦𝐵𝐶)
Assertion
Ref Expression
fnmpo (∀𝑥𝐴𝑦𝐵 𝐶𝑉𝐹 Fn (𝐴 × 𝐵))
Distinct variable groups:   𝑥,𝐴,𝑦   𝑥,𝐵,𝑦
Allowed substitution hints:   𝐶(𝑥,𝑦)   𝐹(𝑥,𝑦)   𝑉(𝑥,𝑦)

Proof of Theorem fnmpo
StepHypRef Expression
1 elex 2746 . . . 4 (𝐶𝑉𝐶 ∈ V)
21ralimi 2538 . . 3 (∀𝑦𝐵 𝐶𝑉 → ∀𝑦𝐵 𝐶 ∈ V)
32ralimi 2538 . 2 (∀𝑥𝐴𝑦𝐵 𝐶𝑉 → ∀𝑥𝐴𝑦𝐵 𝐶 ∈ V)
4 fmpo.1 . . . 4 𝐹 = (𝑥𝐴, 𝑦𝐵𝐶)
54fmpo 6192 . . 3 (∀𝑥𝐴𝑦𝐵 𝐶 ∈ V ↔ 𝐹:(𝐴 × 𝐵)⟶V)
6 dffn2 5359 . . 3 (𝐹 Fn (𝐴 × 𝐵) ↔ 𝐹:(𝐴 × 𝐵)⟶V)
75, 6bitr4i 187 . 2 (∀𝑥𝐴𝑦𝐵 𝐶 ∈ V ↔ 𝐹 Fn (𝐴 × 𝐵))
83, 7sylib 122 1 (∀𝑥𝐴𝑦𝐵 𝐶𝑉𝐹 Fn (𝐴 × 𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1353  wcel 2146  wral 2453  Vcvv 2735   × cxp 4618   Fn wfn 5203  wf 5204  cmpo 5867
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 709  ax-5 1445  ax-7 1446  ax-gen 1447  ax-ie1 1491  ax-ie2 1492  ax-8 1502  ax-10 1503  ax-11 1504  ax-i12 1505  ax-bndl 1507  ax-4 1508  ax-17 1524  ax-i9 1528  ax-ial 1532  ax-i5r 1533  ax-13 2148  ax-14 2149  ax-ext 2157  ax-sep 4116  ax-pow 4169  ax-pr 4203  ax-un 4427
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1459  df-sb 1761  df-eu 2027  df-mo 2028  df-clab 2162  df-cleq 2168  df-clel 2171  df-nfc 2306  df-ral 2458  df-rex 2459  df-rab 2462  df-v 2737  df-sbc 2961  df-csb 3056  df-un 3131  df-in 3133  df-ss 3140  df-pw 3574  df-sn 3595  df-pr 3596  df-op 3598  df-uni 3806  df-iun 3884  df-br 3999  df-opab 4060  df-mpt 4061  df-id 4287  df-xp 4626  df-rel 4627  df-cnv 4628  df-co 4629  df-dm 4630  df-rn 4631  df-res 4632  df-ima 4633  df-iota 5170  df-fun 5210  df-fn 5211  df-f 5212  df-fv 5216  df-oprab 5869  df-mpo 5870  df-1st 6131  df-2nd 6132
This theorem is referenced by:  fnmpoi  6195  dmmpoga  6199  fnmpoovd  6206  f1od2  6226  divfnzn  9592  cnref1o  9621  plusffng  12648  mulgfng  12846  hmeofn  13353
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