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Theorem umgr2v2evtxel 29850
Description: A vertex in a multigraph with two edges connecting the same two vertices. (Contributed by AV, 17-Dec-2020.)
Hypothesis
Ref Expression
umgr2v2evtx.g 𝐺 = ⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩
Assertion
Ref Expression
umgr2v2evtxel ((𝑉𝑊𝐴𝑉) → 𝐴 ∈ (Vtx‘𝐺))

Proof of Theorem umgr2v2evtxel
StepHypRef Expression
1 umgr2v2evtx.g . . 3 𝐺 = ⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩
21umgr2v2evtx 29849 . 2 (𝑉𝑊 → (Vtx‘𝐺) = 𝑉)
3 eqcom 2770 . . . . 5 ((Vtx‘𝐺) = 𝑉𝑉 = (Vtx‘𝐺))
43biimpi 219 . . . 4 ((Vtx‘𝐺) = 𝑉𝑉 = (Vtx‘𝐺))
54eleq2d 2849 . . 3 ((Vtx‘𝐺) = 𝑉 → (𝐴𝑉𝐴 ∈ (Vtx‘𝐺)))
65biimpcd 252 . 2 (𝐴𝑉 → ((Vtx‘𝐺) = 𝑉𝐴 ∈ (Vtx‘𝐺)))
72, 6mpan9 515 1 ((𝑉𝑊𝐴𝑉) → 𝐴 ∈ (Vtx‘𝐺))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  {cpr 4592  cop 4596  cfv 6538  0cc0 11101  1c1 11102  Vtxcvtx 29324
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-iota 6494  df-fun 6540  df-fv 6546  df-1st 7987  df-vtx 29326
This theorem is referenced by:  umgr2v2enb1  29854  umgr2v2evd2  29855
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