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Theorem uhgrspan1lem2 29395
Description: Lemma 2 for uhgrspan1 29397. (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 6837 . 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 29394 . . 3 ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V)
7 opvtxfv 29098 . . 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 2763 1 (Vtx‘𝑆) = (𝑉 ∖ {𝑁})
Colors of variables: wff setvar class
Syntax hints:  wa 396   = wceq 1547  wcel 2119  wnel 3039  {crab 3392  Vcvv 3432  cdif 3887  {csn 4562  cop 4568  dom cdm 5625  cres 5627  cfv 6492  Vtxcvtx 29090  iEdgciedg 29091
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2712  ax-sep 5225  ax-nul 5235  ax-pr 5369  ax-un 7685
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2719  df-cleq 2732  df-clel 2815  df-nfc 2889  df-ne 2936  df-ral 3055  df-rex 3065  df-rab 3393  df-v 3434  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-nul 4269  df-if 4462  df-sn 4563  df-pr 4565  df-op 4569  df-uni 4846  df-br 5080  df-opab 5142  df-mpt 5161  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-iota 6448  df-fun 6494  df-fv 6500  df-1st 7938  df-vtx 29092
This theorem is referenced by:  uhgrspan1  29397  upgrres  29400  umgrres  29401  usgrres  29402
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