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Theorem upgrres1lem2 27581
Description: Lemma 2 for upgrres1 27583. (Contributed by AV, 7-Nov-2020.)
Hypotheses
Ref Expression
upgrres1.v 𝑉 = (Vtx‘𝐺)
upgrres1.e 𝐸 = (Edg‘𝐺)
upgrres1.f 𝐹 = {𝑒𝐸𝑁𝑒}
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
StepHypRef Expression
1 upgrres1.s . . 3 𝑆 = ⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩
21fveq2i 6759 . 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 = {𝑒𝐸𝑁𝑒}
63, 4, 5upgrres1lem1 27579 . . 3 ((𝑉 ∖ {𝑁}) ∈ V ∧ ( I ↾ 𝐹) ∈ V)
7 opvtxfv 27277 . . 3 (((𝑉 ∖ {𝑁}) ∈ V ∧ ( I ↾ 𝐹) ∈ V) → (Vtx‘⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩) = (𝑉 ∖ {𝑁}))
86, 7ax-mp 5 . 2 (Vtx‘⟨(𝑉 ∖ {𝑁}), ( I ↾ 𝐹)⟩) = (𝑉 ∖ {𝑁})
92, 8eqtri 2766 1 (Vtx‘𝑆) = (𝑉 ∖ {𝑁})
Colors of variables: wff setvar class
Syntax hints:  wa 395   = wceq 1539  wcel 2108  wnel 3048  {crab 3067  Vcvv 3422  cdif 3880  {csn 4558  cop 4564   I cid 5479  cres 5582  cfv 6418  Vtxcvtx 27269  Edgcedg 27320
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ne 2943  df-ral 3068  df-rex 3069  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-br 5071  df-opab 5133  df-mpt 5154  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-iota 6376  df-fun 6420  df-fv 6426  df-1st 7804  df-vtx 27271
This theorem is referenced by:  upgrres1  27583  umgrres1  27584  usgrres1  27585  nbupgrres  27634  nbupgruvtxres  27677  uvtxupgrres  27678  cusgrres  27718
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