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| Mirrors > Home > MPE Home > Th. List > wlkiswwlks2lem2 | Structured version Visualization version GIF version | ||
| Description: Lemma 2 for wlkiswwlks2 29862. (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 6881 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘𝑥) = (𝑃‘𝐼)) | |
| 3 | fvoveq1 7433 | . . . 4 ⊢ (𝑥 = 𝐼 → (𝑃‘(𝑥 + 1)) = (𝑃‘(𝐼 + 1))) | |
| 4 | 2, 3 | preq12d 4722 | . . 3 ⊢ (𝑥 = 𝐼 → {(𝑃‘𝑥), (𝑃‘(𝑥 + 1))} = {(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) |
| 5 | 4 | fveq2d 6885 | . 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 6896 | . 2 ⊢ (((♯‘𝑃) ∈ ℕ0 ∧ 𝐼 ∈ (0..^((♯‘𝑃) − 1))) → (◡𝐸‘{(𝑃‘𝐼), (𝑃‘(𝐼 + 1))}) ∈ V) | |
| 8 | 1, 5, 6, 7 | fvmptd3 7014 | 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 1540 ∈ wcel 2109 Vcvv 3464 {cpr 4608 ↦ cmpt 5206 ◡ccnv 5658 ‘cfv 6536 (class class class)co 7410 0cc0 11134 1c1 11135 + caddc 11137 − cmin 11471 ℕ0cn0 12506 ..^cfzo 13676 ♯chash 14353 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pr 5407 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rab 3421 df-v 3466 df-dif 3934 df-un 3936 df-ss 3948 df-nul 4314 df-if 4506 df-sn 4607 df-pr 4609 df-op 4613 df-uni 4889 df-br 5125 df-opab 5187 df-mpt 5207 df-id 5553 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-iota 6489 df-fun 6538 df-fv 6544 df-ov 7413 |
| This theorem is referenced by: wlkiswwlks2lem4 29859 |
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