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Theorem uhgrspan1lem1 29665
Description: Lemma 1 for uhgrspan1 29668. (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)}
Assertion
Ref Expression
uhgrspan1lem1 ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V)

Proof of Theorem uhgrspan1lem1
StepHypRef Expression
1 uhgrspan1.v . . . 4 𝑉 = (Vtx‘𝐺)
21fvexi 6899 . . 3 𝑉 ∈ V
32difexi 5304 . 2 (𝑉 ∖ {𝑁}) ∈ V
4 uhgrspan1.i . . . 4 𝐼 = (iEdg‘𝐺)
54fvexi 6899 . . 3 𝐼 ∈ V
65resex 6031 . 2 (𝐼𝐹) ∈ V
73, 6pm3.2i 476 1 ((𝑉 ∖ {𝑁}) ∈ V ∧ (𝐼𝐹) ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wa 401   = wceq 1570  wcel 2146  wnel 3067  {crab 3419  Vcvv 3458  cdif 3905  {csn 4592  dom cdm 5664  cres 5666  cfv 6540  Vtxcvtx 29361  iEdgciedg 29362
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-ext 2738  ax-sep 5260  ax-nul 5272
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2745  df-cleq 2758  df-clel 2841  df-ne 2962  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-sn 4593  df-pr 4595  df-uni 4876  df-res 5676  df-iota 6496  df-fv 6548
This theorem is used by:  uhgrspan1lem2  29666  uhgrspan1lem3  29667
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