Theorem uhgrspan1lem1 29317

Description: Lemma 1 for uhgrspan1 29320. (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)}

Assertion

Ref	Expression
uhgrspan1lem1	⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V)

Proof of Theorem uhgrspan1lem1

Step	Hyp	Ref	Expression
1		uhgrspan1.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
2	1	fvexi 6920	. . 3 ⊢ 𝑉 ∈ V
3	2	difexi 5330	. 2 ⊢ (𝑉 ∖ {𝑁}) ∈ V
4		uhgrspan1.i	. . . 4 ⊢ 𝐼 = (iEdg‘𝐺)
5	4	fvexi 6920	. . 3 ⊢ 𝐼 ∈ V
6	5	resex 6047	. 2 ⊢ (𝐼 ↾ 𝐹) ∈ V
7	3, 6	pm3.2i 470	1 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V)

Syntax hints:   ∧ wa 395   = wceq 1540   ∈ wcel 2108   ∉ wnel 3046  {crab 3436  Vcvv 3480   ∖ cdif 3948  {csn 4626  dom cdm 5685   ↾ cres 5687  ‘cfv 6561  Vtxcvtx 29013  iEdgciedg 29014

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2708  ax-sep 5296  ax-nul 5306

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2065  df-clab 2715  df-cleq 2729  df-clel 2816  df-ne 2941  df-rab 3437  df-v 3482  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-sn 4627  df-pr 4629  df-uni 4908  df-res 5697  df-iota 6514  df-fv 6569

This theorem is referenced by:  uhgrspan1lem2  29318  uhgrspan1lem3  29319