Theorem uhgrspan1lem3 26194

Description: Lemma 3 for uhgrspan1 26195. (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
uhgrspan1lem3	⊢ (iEdg‘𝑆) = (𝐼 ↾ 𝐹)

Proof of Theorem uhgrspan1lem3

Step	Hyp	Ref	Expression
1		uhgrspan1.s	. . 3 ⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩
2	1	fveq2i 6194	. 2 ⊢ (iEdg‘𝑆) = (iEdg‘⟨(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 26192	. . 3 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V)
7		opiedgfv 25887	. . 3 ⊢ (((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼 ↾ 𝐹) ∈ V) → (iEdg‘⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩) = (𝐼 ↾ 𝐹))
8	6, 7	ax-mp 5	. 2 ⊢ (iEdg‘⟨(𝑉 ∖ {𝑁}), (𝐼 ↾ 𝐹)⟩) = (𝐼 ↾ 𝐹)
9	2, 8	eqtri 2644	1 ⊢ (iEdg‘𝑆) = (𝐼 ↾ 𝐹)

Syntax hints:   ∧ wa 384   = wceq 1483   ∈ wcel 1990   ∉ wnel 2897  {crab 2916  Vcvv 3200   ∖ cdif 3571  {csn 4177  ⟨cop 4183  dom cdm 5114   ↾ cres 5116  ‘cfv 5888  Vtxcvtx 25874  iEdgciedg 25875

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-sbc 3436  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-iota 5851  df-fun 5890  df-fv 5896  df-2nd 7169  df-iedg 25877

This theorem is referenced by:  uhgrspan1  26195  upgrres  26198  umgrres  26199  usgrres  26200