opvtxfv - Metamath Proof Explorer

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Theorem opvtxfv 28983

Description: The set of vertices of a graph represented as an ordered pair of vertices and indexed edges as function value. (Contributed by AV, 21-Sep-2020.)

**Assertion**
Ref	Expression
opvtxfv	⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (Vtx‘⟨𝑉, 𝐸⟩) = 𝑉)

**Proof of Theorem opvtxfv**
Step	Hyp	Ref	Expression
1		opelvvg 5695	. . 3 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → ⟨𝑉, 𝐸⟩ ∈ (V × V))
2		opvtxval 28982	. . 3 ⊢ (⟨𝑉, 𝐸⟩ ∈ (V × V) → (Vtx‘⟨𝑉, 𝐸⟩) = (1^st ‘⟨𝑉, 𝐸⟩))
3	1, 2	syl 17	. 2 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (Vtx‘⟨𝑉, 𝐸⟩) = (1^st ‘⟨𝑉, 𝐸⟩))
4		op1stg 8000	. 2 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (1^st ‘⟨𝑉, 𝐸⟩) = 𝑉)
5	3, 4	eqtrd 2770	1 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (Vtx‘⟨𝑉, 𝐸⟩) = 𝑉)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 Vcvv 3459 ⟨cop 4607 × cxp 5652 ‘cfv 6531 1^st c1st 7986 Vtxcvtx 28975

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 2707 ax-sep 5266 ax-nul 5276 ax-pr 5402 ax-un 7729

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3416 df-v 3461 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-iota 6484 df-fun 6533 df-fv 6539 df-1st 7988 df-vtx 28977

This theorem is referenced by: opvtxov 28984 opvtxfvi 28988 gropd 29010 isuhgrop 29049 uhgrunop 29054 upgrop 29073 upgr1eop 29094 upgrunop 29098 umgrunop 29100 isuspgrop 29140 isusgrop 29141 ausgrusgrb 29144 uspgr1eop 29226 usgr1eop 29229 usgrexmpllem 29239 uhgrspan1lem2 29280 upgrres1lem2 29290 opfusgr 29302 fusgrfisbase 29307 fusgrfisstep 29308 usgrexi 29420 cusgrexi 29422 p1evtxdeqlem 29492 p1evtxdeq 29493 p1evtxdp1 29494 uspgrloopvtx 29495 umgr2v2evtx 29501 wlk2v2e 30138 eupthvdres 30216 eupth2lemb 30218 konigsbergvtx 30227 konigsberg 30238 isubgrvtx 47880 opstrgric 47939 ushggricedg 47940 usgrexmpl1vtx 48027 usgrexmpl2vtx 48032 uspgrsprfo 48123

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