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Theorem fnconstg 5084
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 5083 . 2 (𝐵𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵})
2 ffn 5046 . 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 1393  {csn 3375   × cxp 4343   Fn wfn 4897  wf 4898
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-rn 4356  df-fun 4904  df-fn 4905  df-f 4906
This theorem is referenced by:  fconst2g  5376
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