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Theorem fnconstg 5537
Description: A cross product with a singleton is a constant function. (Contributed by NM, 24-Jul-2014.)
Assertion
Ref Expression
fnconstg (𝐵𝑉 → (𝐴 × {𝐵}) Fn 𝐴)

Proof of Theorem fnconstg
StepHypRef Expression
1 fconstg 5536 . 2 (𝐵𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵})
2 ffn 5484 . 2 ((𝐴 × {𝐵}):𝐴⟶{𝐵} → (𝐴 × {𝐵}) Fn 𝐴)
31, 2syl 14 1 (𝐵𝑉 → (𝐴 × {𝐵}) Fn 𝐴)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2201  {csn 3670   × cxp 4725   Fn wfn 5323  wf 5324
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2204  ax-ext 2212  ax-sep 4208  ax-pow 4266  ax-pr 4301
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514  df-rex 2515  df-v 2803  df-un 3203  df-in 3205  df-ss 3212  df-pw 3655  df-sn 3676  df-pr 3677  df-op 3679  df-br 4090  df-opab 4152  df-mpt 4153  df-id 4392  df-xp 4733  df-rel 4734  df-cnv 4735  df-co 4736  df-dm 4737  df-rn 4738  df-fun 5330  df-fn 5331  df-f 5332
This theorem is referenced by:  fconst2g  5872  ofc1g  6262  ofc2g  6263  caofid0l  6267  caofid0r  6268  caofid1  6269  caofid2  6270  pwsplusgval  13401  pwsmulrval  13402  dvidlemap  15444  dvidrelem  15445  dvidsslem  15446  nninfsellemeqinf  16681
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