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Theorem uhgrspan1lem2 27069
Description: Lemma 2 for uhgrspan1 27071. (Contributed by AV, 19-Nov-2020.)
Hypotheses
Ref Expression
uhgrspan1.v 𝑉 = (Vtx‘𝐺)
uhgrspan1.i 𝐼 = (iEdg‘𝐺)
uhgrspan1.f 𝐹 = {𝑖 ∈ dom 𝐼𝑁 ∉ (𝐼𝑖)}
uhgrspan1.s 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩
Assertion
Ref Expression
uhgrspan1lem2 (Vtx‘𝑆) = (𝑉 ∖ {𝑁})

Proof of Theorem uhgrspan1lem2
StepHypRef Expression
1 uhgrspan1.s . . 3 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩
21fveq2i 6659 . 2 (Vtx‘𝑆) = (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩)
3 uhgrspan1.v . . . 4 𝑉 = (Vtx‘𝐺)
4 uhgrspan1.i . . . 4 𝐼 = (iEdg‘𝐺)
5 uhgrspan1.f . . . 4 𝐹 = {𝑖 ∈ dom 𝐼𝑁 ∉ (𝐼𝑖)}
63, 4, 5uhgrspan1lem1 27068 . . 3 ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V)
7 opvtxfv 26775 . . 3 (((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V) → (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩) = (𝑉 ∖ {𝑁}))
86, 7ax-mp 5 . 2 (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩) = (𝑉 ∖ {𝑁})
92, 8eqtri 2844 1 (Vtx‘𝑆) = (𝑉 ∖ {𝑁})
Colors of variables: wff setvar class
Syntax hints:  wa 398   = wceq 1537  wcel 2114  wnel 3123  {crab 3142  Vcvv 3486  cdif 3921  {csn 4553  cop 4559  dom cdm 5541  cres 5543  cfv 6341  Vtxcvtx 26767  iEdgciedg 26768
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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5189  ax-nul 5196  ax-pow 5252  ax-pr 5316  ax-un 7447
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3488  df-sbc 3764  df-dif 3927  df-un 3929  df-in 3931  df-ss 3940  df-nul 4280  df-if 4454  df-sn 4554  df-pr 4556  df-op 4560  df-uni 4825  df-br 5053  df-opab 5115  df-mpt 5133  df-id 5446  df-xp 5547  df-rel 5548  df-cnv 5549  df-co 5550  df-dm 5551  df-rn 5552  df-res 5553  df-iota 6300  df-fun 6343  df-fv 6349  df-1st 7675  df-vtx 26769
This theorem is referenced by:  uhgrspan1  27071  upgrres  27074  umgrres  27075  usgrres  27076
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