Theorem uhgrspan1lem2 26599

Description: Lemma 2 for uhgrspan1 26601. (Contributed by AV, 19-Nov-2020.)

Hypotheses

Ref	Expression
uhgrspan1.v	⊢ 𝑉 = (Vtx‘𝐺)
uhgrspan1.i	⊢ 𝐼 = (iEdg‘𝐺)
uhgrspan1.f	⊢ 𝐹 = {𝑖 ∈ dom 𝐼 ∣ 𝑁 ∉ (𝐼‘𝑖)}
uhgrspan1.s	⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩

Assertion

Ref	Expression
uhgrspan1lem2	⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})

Proof of Theorem uhgrspan1lem2

Step	Hyp	Ref	Expression
1		uhgrspan1.s	. . 3 ⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩
2	1	fveq2i 6437	. 2 ⊢ (Vtx‘𝑆) = (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩)
3		uhgrspan1.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
4		uhgrspan1.i	. . . 4 ⊢ 𝐼 = (iEdg‘𝐺)
5		uhgrspan1.f	. . . 4 ⊢ 𝐹 = {𝑖 ∈ dom 𝐼 ∣ 𝑁 ∉ (𝐼‘𝑖)}
6	3, 4, 5	uhgrspan1lem1 26598	. . 3 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V)
7		opvtxfv 26303	. . 3 ⊢ (((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V) → (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩) = (𝑉 ∖ {𝑁}))
8	6, 7	ax-mp 5	. 2 ⊢ (Vtx‘⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩) = (𝑉 ∖ {𝑁})
9	2, 8	eqtri 2850	1 ⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})

Syntax hints:   ∧ wa 386   = wceq 1658   ∈ wcel 2166   ∉ wnel 3103  {crab 3122  Vcvv 3415   ∖ cdif 3796  {csn 4398  ⟨cop 4404  dom cdm 5343   ↾ cres 5345  ‘cfv 6124  Vtxcvtx 26295  iEdgciedg 26296

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1896  ax-4 1910  ax-5 2011  ax-6 2077  ax-7 2114  ax-8 2168  ax-9 2175  ax-10 2194  ax-11 2209  ax-12 2222  ax-13 2391  ax-ext 2804  ax-sep 5006  ax-nul 5014  ax-pow 5066  ax-pr 5128  ax-un 7210

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 881  df-3an 1115  df-tru 1662  df-ex 1881  df-nf 1885  df-sb 2070  df-mo 2606  df-eu 2641  df-clab 2813  df-cleq 2819  df-clel 2822  df-nfc 2959  df-ral 3123  df-rex 3124  df-rab 3127  df-v 3417  df-sbc 3664  df-dif 3802  df-un 3804  df-in 3806  df-ss 3813  df-nul 4146  df-if 4308  df-sn 4399  df-pr 4401  df-op 4405  df-uni 4660  df-br 4875  df-opab 4937  df-mpt 4954  df-id 5251  df-xp 5349  df-rel 5350  df-cnv 5351  df-co 5352  df-dm 5353  df-rn 5354  df-res 5355  df-iota 6087  df-fun 6126  df-fv 6132  df-1st 7429  df-vtx 26297

This theorem is referenced by:  uhgrspan1  26601  upgrres  26604  umgrres  26605  usgrres  26606