MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  trlsegvdeglem3 Structured version   Visualization version   GIF version

Theorem trlsegvdeglem3 30256
Description: Lemma for trlsegvdeg 30261. (Contributed by AV, 20-Feb-2021.)
Hypotheses
Ref Expression
trlsegvdeg.v 𝑉 = (Vtx‘𝐺)
trlsegvdeg.i 𝐼 = (iEdg‘𝐺)
trlsegvdeg.f (𝜑 → Fun 𝐼)
trlsegvdeg.n (𝜑𝑁 ∈ (0..^(♯‘𝐹)))
trlsegvdeg.u (𝜑𝑈𝑉)
trlsegvdeg.w (𝜑𝐹(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) = {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
trlsegvdeg.iz (𝜑 → (iEdg‘𝑍) = (𝐼 ↾ (𝐹 “ (0...𝑁))))
Assertion
Ref Expression
trlsegvdeglem3 (𝜑 → Fun (iEdg‘𝑌))

Proof of Theorem trlsegvdeglem3
StepHypRef Expression
1 fvex 6935 . . . 4 (𝐹𝑁) ∈ V
2 fvex 6935 . . . 4 (𝐼‘(𝐹𝑁)) ∈ V
31, 2pm3.2i 470 . . 3 ((𝐹𝑁) ∈ V ∧ (𝐼‘(𝐹𝑁)) ∈ V)
4 funsng 6631 . . 3 (((𝐹𝑁) ∈ V ∧ (𝐼‘(𝐹𝑁)) ∈ V) → Fun {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
53, 4mp1i 13 . 2 (𝜑 → Fun {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
6 trlsegvdeg.iy . . 3 (𝜑 → (iEdg‘𝑌) = {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩})
76funeqd 6602 . 2 (𝜑 → (Fun (iEdg‘𝑌) ↔ Fun {⟨(𝐹𝑁), (𝐼‘(𝐹𝑁))⟩}))
85, 7mpbird 257 1 (𝜑 → Fun (iEdg‘𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1537  wcel 2108  Vcvv 3488  {csn 4648  cop 4654   class class class wbr 5166  cres 5702  cima 5703  Fun wfun 6569  cfv 6575  (class class class)co 7450  0cc0 11186  ...cfz 13569  ..^cfzo 13713  chash 14381  Vtxcvtx 29033  iEdgciedg 29034  Trailsctrls 29728
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-sb 2065  df-mo 2543  df-clab 2718  df-cleq 2732  df-clel 2819  df-ne 2947  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-opab 5229  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-iota 6527  df-fun 6577  df-fv 6583
This theorem is referenced by:  trlsegvdeg  30261
  Copyright terms: Public domain W3C validator