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| Mirrors > Home > MPE Home > Th. List > umgr2v2evtxel | Structured version Visualization version GIF version | ||
| Description: A vertex in a multigraph with two edges connecting the same two vertices. (Contributed by AV, 17-Dec-2020.) |
| Ref | Expression |
|---|---|
| umgr2v2evtx.g | ⊢ 𝐺 = 〈𝑉, {〈0, {𝐴, 𝐵}〉, 〈1, {𝐴, 𝐵}〉}〉 |
| Ref | Expression |
|---|---|
| umgr2v2evtxel | ⊢ ((𝑉 ∈ 𝑊 ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ (Vtx‘𝐺)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | umgr2v2evtx.g | . . 3 ⊢ 𝐺 = 〈𝑉, {〈0, {𝐴, 𝐵}〉, 〈1, {𝐴, 𝐵}〉}〉 | |
| 2 | 1 | umgr2v2evtx 29989 | . 2 ⊢ (𝑉 ∈ 𝑊 → (Vtx‘𝐺) = 𝑉) |
| 3 | eqcom 2769 | . . . . 5 ⊢ ((Vtx‘𝐺) = 𝑉 ↔ 𝑉 = (Vtx‘𝐺)) | |
| 4 | 3 | biimpi 219 | . . . 4 ⊢ ((Vtx‘𝐺) = 𝑉 → 𝑉 = (Vtx‘𝐺)) |
| 5 | 4 | eleq2d 2848 | . . 3 ⊢ ((Vtx‘𝐺) = 𝑉 → (𝐴 ∈ 𝑉 ↔ 𝐴 ∈ (Vtx‘𝐺))) |
| 6 | 5 | biimpcd 252 | . 2 ⊢ (𝐴 ∈ 𝑉 → ((Vtx‘𝐺) = 𝑉 → 𝐴 ∈ (Vtx‘𝐺))) |
| 7 | 2, 6 | mpan9 516 | 1 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝐴 ∈ 𝑉) → 𝐴 ∈ (Vtx‘𝐺)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {cpr 4589 〈cop 4593 ‘cfv 6537 0cc0 11128 1c1 11129 Vtxcvtx 29461 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-iota 6493 df-fun 6539 df-fv 6545 df-1st 7990 df-vtx 29463 |
| This theorem is used by: umgr2v2enb1 29994 umgr2v2evd2 29995 |
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