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| Mirrors > Home > MPE Home > Th. List > trlsegvdeglem3 | Structured version Visualization version GIF version | ||
| Description: Lemma for trlsegvdeg 30519. (Contributed by AV, 20-Feb-2021.) |
| Ref | Expression |
|---|---|
| trlsegvdeg.v | ⊢ 𝑉 = (Vtx‘𝐺) |
| trlsegvdeg.i | ⊢ 𝐼 = (iEdg‘𝐺) |
| trlsegvdeg.f | ⊢ (𝜑 → Fun 𝐼) |
| trlsegvdeg.n | ⊢ (𝜑 → 𝑁 ∈ (0..^(♯‘𝐹))) |
| trlsegvdeg.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| trlsegvdeg.w | ⊢ (𝜑 → 𝐹(Trails‘𝐺)𝑃) |
| trlsegvdeg.vx | ⊢ (𝜑 → (Vtx‘𝑋) = 𝑉) |
| trlsegvdeg.vy | ⊢ (𝜑 → (Vtx‘𝑌) = 𝑉) |
| trlsegvdeg.vz | ⊢ (𝜑 → (Vtx‘𝑍) = 𝑉) |
| trlsegvdeg.ix | ⊢ (𝜑 → (iEdg‘𝑋) = (𝐼 ↾ (𝐹 “ (0..^𝑁)))) |
| trlsegvdeg.iy | ⊢ (𝜑 → (iEdg‘𝑌) = {〈(𝐹‘𝑁), (𝐼‘(𝐹‘𝑁))〉}) |
| trlsegvdeg.iz | ⊢ (𝜑 → (iEdg‘𝑍) = (𝐼 ↾ (𝐹 “ (0...𝑁)))) |
| Ref | Expression |
|---|---|
| trlsegvdeglem3 | ⊢ (𝜑 → Fun (iEdg‘𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvex 6895 | . . . 4 ⊢ (𝐹‘𝑁) ∈ V | |
| 2 | fvex 6895 | . . . 4 ⊢ (𝐼‘(𝐹‘𝑁)) ∈ V | |
| 3 | 1, 2 | pm3.2i 475 | . . 3 ⊢ ((𝐹‘𝑁) ∈ V ∧ (𝐼‘(𝐹‘𝑁)) ∈ V) |
| 4 | funsng 6588 | . . 3 ⊢ (((𝐹‘𝑁) ∈ V ∧ (𝐼‘(𝐹‘𝑁)) ∈ V) → Fun {〈(𝐹‘𝑁), (𝐼‘(𝐹‘𝑁))〉}) | |
| 5 | 3, 4 | mp1i 14 | . 2 ⊢ (𝜑 → Fun {〈(𝐹‘𝑁), (𝐼‘(𝐹‘𝑁))〉}) |
| 6 | trlsegvdeg.iy | . . 3 ⊢ (𝜑 → (iEdg‘𝑌) = {〈(𝐹‘𝑁), (𝐼‘(𝐹‘𝑁))〉}) | |
| 7 | 6 | funeqd 6559 | . 2 ⊢ (𝜑 → (Fun (iEdg‘𝑌) ↔ Fun {〈(𝐹‘𝑁), (𝐼‘(𝐹‘𝑁))〉})) |
| 8 | 5, 7 | mpbird 260 | 1 ⊢ (𝜑 → Fun (iEdg‘𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1567 ∈ wcel 2149 Vcvv 3463 {csn 4594 〈cop 4600 class class class wbr 5113 ↾ cres 5664 “ cima 5665 Fun wfun 6531 ‘cfv 6537 (class class class)co 7411 0cc0 11100 ...cfz 13535 ..^cfzo 13682 ♯chash 14366 Vtxcvtx 29287 iEdgciedg 29288 Trailsctrls 29979 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-mo 2573 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-iota 6493 df-fun 6539 df-fv 6545 |
| This theorem is referenced by: trlsegvdeg 30519 |
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