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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ovsng2 | Structured version Visualization version GIF version | ||
| Description: The operation value of a singleton of an ordered triple is the last member. (Contributed by Zhi Wang, 22-Oct-2025.) |
| Ref | Expression |
|---|---|
| ovsng2 | ⊢ (𝐶 ∈ 𝑉 → (𝐴{〈𝐴, 𝐵, 𝐶〉}𝐵) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ot 4600 | . . . 4 ⊢ 〈𝐴, 𝐵, 𝐶〉 = 〈〈𝐴, 𝐵〉, 𝐶〉 | |
| 2 | 1 | sneqi 4602 | . . 3 ⊢ {〈𝐴, 𝐵, 𝐶〉} = {〈〈𝐴, 𝐵〉, 𝐶〉} |
| 3 | 2 | oveqi 7432 | . 2 ⊢ (𝐴{〈𝐴, 𝐵, 𝐶〉}𝐵) = (𝐴{〈〈𝐴, 𝐵〉, 𝐶〉}𝐵) |
| 4 | ovsng 49693 | . 2 ⊢ (𝐶 ∈ 𝑉 → (𝐴{〈〈𝐴, 𝐵〉, 𝐶〉}𝐵) = 𝐶) | |
| 5 | 3, 4 | eqtrid 2812 | 1 ⊢ (𝐶 ∈ 𝑉 → (𝐴{〈𝐴, 𝐵, 𝐶〉}𝐵) = 𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 {csn 4591 〈cop 4597 〈cotp 4599 (class class class)co 7419 |
| 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 2148 ax-9 2156 ax-10 2179 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-ot 4600 df-uni 4875 df-br 5112 df-opab 5176 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6496 df-fun 6542 df-fv 6548 df-ov 7422 |
| This theorem is used by: ovsn2 49696 |
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