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Theorem repsf 14696
Description: The constructed function mapping a half-open range of nonnegative integers to a constant is a function. (Contributed by AV, 4-Nov-2018.)
Assertion
Ref Expression
repsf ((𝑆𝑉𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁):(0..^𝑁)⟶𝑉)

Proof of Theorem repsf
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 simpl 482 . . . . 5 ((𝑆𝑉𝑥 ∈ (0..^𝑁)) → 𝑆𝑉)
21ralrimiva 3128 . . . 4 (𝑆𝑉 → ∀𝑥 ∈ (0..^𝑁)𝑆𝑉)
32adantr 480 . . 3 ((𝑆𝑉𝑁 ∈ ℕ0) → ∀𝑥 ∈ (0..^𝑁)𝑆𝑉)
4 eqid 2736 . . . 4 (𝑥 ∈ (0..^𝑁) ↦ 𝑆) = (𝑥 ∈ (0..^𝑁) ↦ 𝑆)
54fmpt 7055 . . 3 (∀𝑥 ∈ (0..^𝑁)𝑆𝑉 ↔ (𝑥 ∈ (0..^𝑁) ↦ 𝑆):(0..^𝑁)⟶𝑉)
63, 5sylib 218 . 2 ((𝑆𝑉𝑁 ∈ ℕ0) → (𝑥 ∈ (0..^𝑁) ↦ 𝑆):(0..^𝑁)⟶𝑉)
7 reps 14693 . . 3 ((𝑆𝑉𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁) = (𝑥 ∈ (0..^𝑁) ↦ 𝑆))
87feq1d 6644 . 2 ((𝑆𝑉𝑁 ∈ ℕ0) → ((𝑆 repeatS 𝑁):(0..^𝑁)⟶𝑉 ↔ (𝑥 ∈ (0..^𝑁) ↦ 𝑆):(0..^𝑁)⟶𝑉))
96, 8mpbird 257 1 ((𝑆𝑉𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁):(0..^𝑁)⟶𝑉)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wcel 2113  wral 3051  cmpt 5179  wf 6488  (class class class)co 7358  0cc0 11026  0cn0 12401  ..^cfzo 13570   repeatS creps 14691
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pr 5377
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-ov 7361  df-oprab 7362  df-mpo 7363  df-reps 14692
This theorem is referenced by:  repsw  14698  repswlen  14699  repswswrd  14707  repsco  14763
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