MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  vtxdginducedm1lem1 Structured version   Visualization version   GIF version

Theorem vtxdginducedm1lem1 29557
Description: Lemma 1 for vtxdginducedm1 29561: the edge function in the induced subgraph 𝑆 of a pseudograph 𝐺 obtained by removing one vertex 𝑁. (Contributed by AV, 16-Dec-2021.)
Hypotheses
Ref Expression
vtxdginducedm1.v 𝑉 = (Vtx‘𝐺)
vtxdginducedm1.e 𝐸 = (iEdg‘𝐺)
vtxdginducedm1.k 𝐾 = (𝑉 ∖ {𝑁})
vtxdginducedm1.i 𝐼 = {𝑖 ∈ dom 𝐸𝑁 ∉ (𝐸𝑖)}
vtxdginducedm1.p 𝑃 = (𝐸𝐼)
vtxdginducedm1.s 𝑆 = ⟨𝐾, 𝑃
Assertion
Ref Expression
vtxdginducedm1lem1 (iEdg‘𝑆) = 𝑃

Proof of Theorem vtxdginducedm1lem1
StepHypRef Expression
1 vtxdginducedm1.s . . 3 𝑆 = ⟨𝐾, 𝑃
21fveq2i 6909 . 2 (iEdg‘𝑆) = (iEdg‘⟨𝐾, 𝑃⟩)
3 vtxdginducedm1.k . . . 4 𝐾 = (𝑉 ∖ {𝑁})
4 vtxdginducedm1.v . . . . . 6 𝑉 = (Vtx‘𝐺)
54fvexi 6920 . . . . 5 𝑉 ∈ V
65difexi 5330 . . . 4 (𝑉 ∖ {𝑁}) ∈ V
73, 6eqeltri 2837 . . 3 𝐾 ∈ V
8 vtxdginducedm1.p . . . 4 𝑃 = (𝐸𝐼)
9 vtxdginducedm1.e . . . . . 6 𝐸 = (iEdg‘𝐺)
109fvexi 6920 . . . . 5 𝐸 ∈ V
1110resex 6047 . . . 4 (𝐸𝐼) ∈ V
128, 11eqeltri 2837 . . 3 𝑃 ∈ V
137, 12opiedgfvi 29027 . 2 (iEdg‘⟨𝐾, 𝑃⟩) = 𝑃
142, 13eqtri 2765 1 (iEdg‘𝑆) = 𝑃
Colors of variables: wff setvar class
Syntax hints:   = wceq 1540  wnel 3046  {crab 3436  Vcvv 3480  cdif 3948  {csn 4626  cop 4632  dom cdm 5685  cres 5687  cfv 6561  Vtxcvtx 29013  iEdgciedg 29014
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 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2708  ax-sep 5296  ax-nul 5306  ax-pr 5432  ax-un 7755
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2540  df-eu 2569  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2892  df-ne 2941  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-br 5144  df-opab 5206  df-mpt 5226  df-id 5578  df-xp 5691  df-rel 5692  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-iota 6514  df-fun 6563  df-fv 6569  df-2nd 8015  df-iedg 29016
This theorem is referenced by:  vtxdginducedm1lem2  29558  vtxdginducedm1lem3  29559  vtxdginducedm1fi  29562  finsumvtxdg2ssteplem4  29566
  Copyright terms: Public domain W3C validator