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Theorem umgr2v2evtxel 29558
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 29557 . 2 (𝑉𝑊 → (Vtx‘𝐺) = 𝑉)
3 eqcom 2747 . . . . 5 ((Vtx‘𝐺) = 𝑉𝑉 = (Vtx‘𝐺))
43biimpi 216 . . . 4 ((Vtx‘𝐺) = 𝑉𝑉 = (Vtx‘𝐺))
54eleq2d 2830 . . 3 ((Vtx‘𝐺) = 𝑉 → (𝐴𝑉𝐴 ∈ (Vtx‘𝐺)))
65biimpcd 249 . 2 (𝐴𝑉 → ((Vtx‘𝐺) = 𝑉𝐴 ∈ (Vtx‘𝐺)))
72, 6mpan9 506 1 ((𝑉𝑊𝐴𝑉) → 𝐴 ∈ (Vtx‘𝐺))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1537  wcel 2108  {cpr 4650  cop 4654  cfv 6573  0cc0 11184  1c1 11185  Vtxcvtx 29031
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2158  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447  ax-un 7770
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-nfc 2895  df-ne 2947  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-opab 5229  df-mpt 5250  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-iota 6525  df-fun 6575  df-fv 6581  df-1st 8030  df-vtx 29033
This theorem is referenced by:  umgr2v2enb1  29562  umgr2v2evd2  29563
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