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Theorem uhgrspan1lem3 29265
Description: Lemma 3 for uhgrspan1 29266. (Contributed by AV, 19-Nov-2020.)
Hypotheses
Ref Expression
uhgrspan1.v 𝑉 = (Vtx‘𝐺)
uhgrspan1.i 𝐼 = (iEdg‘𝐺)
uhgrspan1.f 𝐹 = {𝑖 ∈ dom 𝐼𝑁 ∉ (𝐼𝑖)}
uhgrspan1.s 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩
Assertion
Ref Expression
uhgrspan1lem3 (iEdg‘𝑆) = (𝐼𝐹)

Proof of Theorem uhgrspan1lem3
StepHypRef Expression
1 uhgrspan1.s . . 3 𝑆 = ⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩
21fveq2i 6829 . 2 (iEdg‘𝑆) = (iEdg‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩)
3 uhgrspan1.v . . . 4 𝑉 = (Vtx‘𝐺)
4 uhgrspan1.i . . . 4 𝐼 = (iEdg‘𝐺)
5 uhgrspan1.f . . . 4 𝐹 = {𝑖 ∈ dom 𝐼𝑁 ∉ (𝐼𝑖)}
63, 4, 5uhgrspan1lem1 29263 . . 3 ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V)
7 opiedgfv 28970 . . 3 (((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V) → (iEdg‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩) = (𝐼𝐹))
86, 7ax-mp 5 . 2 (iEdg‘⟨(𝑉 ∖ {𝑁}), (𝐼𝐹)⟩) = (𝐼𝐹)
92, 8eqtri 2752 1 (iEdg‘𝑆) = (𝐼𝐹)
Colors of variables: wff setvar class
Syntax hints:  wa 395   = wceq 1540  wcel 2109  wnel 3029  {crab 3396  Vcvv 3438  cdif 3902  {csn 4579  cop 4585  dom cdm 5623  cres 5625  cfv 6486  Vtxcvtx 28959  iEdgciedg 28960
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 5238  ax-nul 5248  ax-pr 5374  ax-un 7675
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 3397  df-v 3440  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4479  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4862  df-br 5096  df-opab 5158  df-mpt 5177  df-id 5518  df-xp 5629  df-rel 5630  df-cnv 5631  df-co 5632  df-dm 5633  df-rn 5634  df-res 5635  df-iota 6442  df-fun 6488  df-fv 6494  df-2nd 7932  df-iedg 28962
This theorem is referenced by:  uhgrspan1  29266  upgrres  29269  umgrres  29270  usgrres  29271
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