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Theorem pthsonfval 28977
Description: The set of paths between two vertices (in an undirected graph). (Contributed by Alexander van der Vekens, 8-Nov-2017.) (Revised by AV, 16-Jan-2021.) (Revised by AV, 21-Mar-2021.)
Hypothesis
Ref Expression
pthsonfval.v 𝑉 = (Vtx‘𝐺)
Assertion
Ref Expression
pthsonfval ((𝐴𝑉𝐵𝑉) → (𝐴(PathsOn‘𝐺)𝐵) = {⟨𝑓, 𝑝⟩ ∣ (𝑓(𝐴(TrailsOn‘𝐺)𝐵)𝑝𝑓(Paths‘𝐺)𝑝)})
Distinct variable groups:   𝑓,𝐺,𝑝   𝐴,𝑓,𝑝   𝐵,𝑓,𝑝   𝑓,𝑉,𝑝

Proof of Theorem pthsonfval
Dummy variables 𝑎 𝑏 𝑔 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 pthsonfval.v . . . 4 𝑉 = (Vtx‘𝐺)
211vgrex 28242 . . 3 (𝐴𝑉𝐺 ∈ V)
32adantr 482 . 2 ((𝐴𝑉𝐵𝑉) → 𝐺 ∈ V)
4 simpl 484 . . 3 ((𝐴𝑉𝐵𝑉) → 𝐴𝑉)
54, 1eleqtrdi 2844 . 2 ((𝐴𝑉𝐵𝑉) → 𝐴 ∈ (Vtx‘𝐺))
6 simpr 486 . . 3 ((𝐴𝑉𝐵𝑉) → 𝐵𝑉)
76, 1eleqtrdi 2844 . 2 ((𝐴𝑉𝐵𝑉) → 𝐵 ∈ (Vtx‘𝐺))
8 df-pthson 28955 . 2 PathsOn = (𝑔 ∈ V ↦ (𝑎 ∈ (Vtx‘𝑔), 𝑏 ∈ (Vtx‘𝑔) ↦ {⟨𝑓, 𝑝⟩ ∣ (𝑓(𝑎(TrailsOn‘𝑔)𝑏)𝑝𝑓(Paths‘𝑔)𝑝)}))
93, 5, 7, 8mptmpoopabovd 8063 1 ((𝐴𝑉𝐵𝑉) → (𝐴(PathsOn‘𝐺)𝐵) = {⟨𝑓, 𝑝⟩ ∣ (𝑓(𝐴(TrailsOn‘𝐺)𝐵)𝑝𝑓(Paths‘𝐺)𝑝)})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 397   = wceq 1542  wcel 2107  Vcvv 3475   class class class wbr 5147  {copab 5209  cfv 6540  (class class class)co 7404  Vtxcvtx 28236  TrailsOnctrlson 28928  Pathscpths 28949  PathsOncpthson 28951
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-rep 5284  ax-sep 5298  ax-nul 5305  ax-pow 5362  ax-pr 5426  ax-un 7720
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2942  df-ral 3063  df-rex 3072  df-reu 3378  df-rab 3434  df-v 3477  df-sbc 3777  df-csb 3893  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4322  df-if 4528  df-pw 4603  df-sn 4628  df-pr 4630  df-op 4634  df-uni 4908  df-iun 4998  df-br 5148  df-opab 5210  df-mpt 5231  df-id 5573  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-rn 5686  df-res 5687  df-ima 5688  df-iota 6492  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-ov 7407  df-oprab 7408  df-mpo 7409  df-1st 7970  df-2nd 7971  df-pthson 28955
This theorem is referenced by:  ispthson  28979
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