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| Mirrors > Home > MPE Home > Th. List > wlkiswwlks2lem2 | Structured version Visualization version GIF version | ||
| Description: Lemma 2 for wlkiswwlks2 29874. (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 6831 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘𝑥) = (𝑃‘𝐼)) | |
| 3 | fvoveq1 7378 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘(𝑥 + 1)) = (𝑃‘(𝐼 + 1))) | |
| 4 | 2, 3 | preq12d 4695 | . . 3 ⊢ (𝑥 = 𝐼 → {(𝑃‘𝑥), (𝑃‘(𝑥 + 1))} = {(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) |
| 5 | 4 | fveq2d 6835 | . 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 6846 | . 2 ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) ∈ V) | |
| 8 | 1, 5, 6, 7 | fvmptd3 6961 | 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 1541 ∈ wcel 2113 Vcvv 3437 {cpr 4579 ↦ cmpt 5176 ◡ccnv 5620 ‘cfv 6489 (class class class)co 7355 0cc0 11017 1c1 11018 + caddc 11020 − cmin 11355 ℕ0cn0 12392 ..^cfzo 13561 ♯chash 14244 |
| 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 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pr 5374 |
| 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 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-rab 3397 df-v 3439 df-dif 3901 df-un 3903 df-ss 3915 df-nul 4283 df-if 4477 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-iota 6445 df-fun 6491 df-fv 6497 df-ov 7358 |
| This theorem is referenced by: wlkiswwlks2lem4 29871 |
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