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Theorem fvconst 7118
Description: The value of a constant function. (Contributed by NM, 30-May-1999.)
Assertion
Ref Expression
fvconst ((𝐹:𝐴⟶{𝐵} ∧ 𝐶𝐴) → (𝐹𝐶) = 𝐵)

Proof of Theorem fvconst
StepHypRef Expression
1 ffvelcdm 7035 . 2 ((𝐹:𝐴⟶{𝐵} ∧ 𝐶𝐴) → (𝐹𝐶) ∈ {𝐵})
2 elsni 4599 . 2 ((𝐹𝐶) ∈ {𝐵} → (𝐹𝐶) = 𝐵)
31, 2syl 17 1 ((𝐹:𝐴⟶{𝐵} ∧ 𝐶𝐴) → (𝐹𝐶) = 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1542  wcel 2114  {csn 4582  wf 6496  cfv 6500
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-12 2185  ax-ext 2709  ax-sep 5243  ax-nul 5253  ax-pr 5379
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-ne 2934  df-ral 3053  df-rex 3063  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-id 5527  df-xp 5638  df-rel 5639  df-cnv 5640  df-co 5641  df-dm 5642  df-rn 5643  df-iota 6456  df-fun 6502  df-fn 6503  df-f 6504  df-fv 6508
This theorem is referenced by:  fvconst2g  7158  fconst2g  7159  f1cdmsn  7238  nf1const  7260  zrtermorngc  20588  zrtermoringc  20620  ipasslem9  30925  resf1o  32819  elrgspnlem1  33335  ccatmulgnn0dir  34719  prv1n  35644  sticksstones11  42520
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