Theorem upgrres1lem2 29214

Description: Lemma 2 for upgrres1 29216. (Contributed by AV, 7-Nov-2020.)

Hypotheses

Ref	Expression
upgrres1.v	⊢ 𝑉 = (Vtx‘𝐺)
upgrres1.e	⊢ 𝐸 = (Edg‘𝐺)
upgrres1.f	⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
upgrres1.s	⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩

Assertion

Ref	Expression
upgrres1lem2	⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})

Distinct variable groups:   𝑒,𝐸   𝑒,𝐺   𝑒,𝑁   𝑒,𝑉

Allowed substitution hints:   𝑆(𝑒)   𝐹(𝑒)

Proof of Theorem upgrres1lem2

Step	Hyp	Ref	Expression
1		upgrres1.s	. . 3 ⊢ 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩
2	1	fveq2i 6843	. 2 ⊢ (Vtx‘𝑆) = (Vtx‘⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩)
3		upgrres1.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
4		upgrres1.e	. . . 4 ⊢ 𝐸 = (Edg‘𝐺)
5		upgrres1.f	. . . 4 ⊢ 𝐹 = {𝑒 ∈ 𝐸 ∣ 𝑁 ∉ 𝑒}
6	3, 4, 5	upgrres1lem1 29212	. . 3 ⊢ ((𝑉 ∖ {𝑁}) ∈ V ∧ ( I ↾ 𝐹) ∈ V)
7		opvtxfv 28907	. . 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 2752	1 ⊢ (Vtx‘𝑆) = (𝑉 ∖ {𝑁})

Syntax hints:   ∧ wa 395   = wceq 1540   ∈ wcel 2109   ∉ wnel 3029  {crab 3402  Vcvv 3444   ∖ cdif 3908  {csn 4585  ⟨cop 4591   I cid 5525   ↾ cres 5633  ‘cfv 6499  Vtxcvtx 28899  Edgcedg 28950

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 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rab 3403  df-v 3446  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-br 5103  df-opab 5165  df-mpt 5184  df-id 5526  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-iota 6452  df-fun 6501  df-fv 6507  df-1st 7947  df-vtx 28901

This theorem is referenced by:  upgrres1  29216  umgrres1  29217  usgrres1  29218  nbupgrres  29267  nbupgruvtxres  29310  uvtxupgrres  29311  cusgrres  29352