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Mirrors > Home > MPE Home > Th. List > wlkiswwlks2lem2 | Structured version Visualization version GIF version |
Description: Lemma 2 for wlkiswwlks2 28141. (Contributed by Alexander van der Vekens, 20-Jul-2018.) |
Ref | Expression |
---|---|
wlkiswwlks2lem.f | ⊢ 𝐹 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡𝐸‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) |
Ref | Expression |
---|---|
wlkiswwlks2lem2 | ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝐼) = (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wlkiswwlks2lem.f | . 2 ⊢ 𝐹 = (𝑥 ∈ (0..^((♯‘𝑃) − 1)) ↦ (◡𝐸‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))})) | |
2 | fveq2 6756 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘𝑥) = (𝑃‘𝐼)) | |
3 | fvoveq1 7278 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘(𝑥 + 1)) = (𝑃‘(𝐼 + 1))) | |
4 | 2, 3 | preq12d 4674 | . . 3 ⊢ (𝑥 = 𝐼 → {(𝑃‘𝑥), (𝑃‘(𝑥 + 1))} = {(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) |
5 | 4 | fveq2d 6760 | . 2 ⊢ (𝑥 = 𝐼 → (◡𝐸‘{(𝑃‘𝑥), (𝑃‘(𝑥 + 1))}) = (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))})) |
6 | simpr 484 | . 2 ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → 𝐼 ∈ (0..^((♯‘𝑃) − 1))) | |
7 | fvexd 6771 | . 2 ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) ∈ V) | |
8 | 1, 5, 6, 7 | fvmptd3 6880 | 1 ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → (𝐹‘𝐼) = (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))})) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 Vcvv 3422 {cpr 4560 ↦ cmpt 5153 ◡ccnv 5579 ‘cfv 6418 (class class class)co 7255 0cc0 10802 1c1 10803 + caddc 10805 − cmin 11135 ℕ0cn0 12163 ..^cfzo 13311 ♯chash 13972 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-iota 6376 df-fun 6420 df-fv 6426 df-ov 7258 |
This theorem is referenced by: wlkiswwlks2lem4 28138 |
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