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Theorem umgr2v2evtx 27791
Description: The set of vertices 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
umgr2v2evtx (𝑉𝑊 → (Vtx‘𝐺) = 𝑉)

Proof of Theorem umgr2v2evtx
StepHypRef Expression
1 umgr2v2evtx.g . . 3 𝐺 = ⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩
21fveq2i 6759 . 2 (Vtx‘𝐺) = (Vtx‘⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩)
3 prex 5350 . . 3 {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩} ∈ V
4 opvtxfv 27277 . . 3 ((𝑉𝑊 ∧ {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩} ∈ V) → (Vtx‘⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩) = 𝑉)
53, 4mpan2 687 . 2 (𝑉𝑊 → (Vtx‘⟨𝑉, {⟨0, {𝐴, 𝐵}⟩, ⟨1, {𝐴, 𝐵}⟩}⟩) = 𝑉)
62, 5syl5eq 2791 1 (𝑉𝑊 → (Vtx‘𝐺) = 𝑉)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1539  wcel 2108  Vcvv 3422  {cpr 4560  cop 4564  cfv 6418  0cc0 10802  1c1 10803  Vtxcvtx 27269
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-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-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-iota 6376  df-fun 6420  df-fv 6426  df-1st 7804  df-vtx 27271
This theorem is referenced by:  umgr2v2evtxel  27792  umgr2v2e  27795  umgr2v2enb1  27796
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