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Mirrors > Home > MPE Home > Th. List > vtxvalsnop | Structured version Visualization version GIF version |
Description: Degenerated case 2 for vertices: The set of vertices of a singleton containing an ordered pair with equal components is the singleton containing the component. (Contributed by AV, 24-Sep-2020.) (Proof shortened by AV, 15-Jul-2022.) (Avoid depending on this detail.) |
Ref | Expression |
---|---|
vtxvalsnop.b | ⊢ 𝐵 ∈ V |
vtxvalsnop.g | ⊢ 𝐺 = {〈𝐵, 𝐵〉} |
Ref | Expression |
---|---|
vtxvalsnop | ⊢ (Vtx‘𝐺) = {𝐵} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vtxvalsnop.g | . . 3 ⊢ 𝐺 = {〈𝐵, 𝐵〉} | |
2 | 1 | fveq2i 6648 | . 2 ⊢ (Vtx‘𝐺) = (Vtx‘{〈𝐵, 𝐵〉}) |
3 | vtxvalsnop.b | . . . 4 ⊢ 𝐵 ∈ V | |
4 | 3 | snopeqopsnid 5364 | . . 3 ⊢ {〈𝐵, 𝐵〉} = 〈{𝐵}, {𝐵}〉 |
5 | 4 | fveq2i 6648 | . 2 ⊢ (Vtx‘{〈𝐵, 𝐵〉}) = (Vtx‘〈{𝐵}, {𝐵}〉) |
6 | snex 5297 | . . 3 ⊢ {𝐵} ∈ V | |
7 | 6, 6 | opvtxfvi 26802 | . 2 ⊢ (Vtx‘〈{𝐵}, {𝐵}〉) = {𝐵} |
8 | 2, 5, 7 | 3eqtri 2825 | 1 ⊢ (Vtx‘𝐺) = {𝐵} |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1538 ∈ wcel 2111 Vcvv 3441 {csn 4525 〈cop 4531 ‘cfv 6324 Vtxcvtx 26789 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-iota 6283 df-fun 6326 df-fv 6332 df-1st 7671 df-vtx 26791 |
This theorem is referenced by: vtxval3sn 26836 |
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