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| Mirrors > Home > MPE Home > Th. List > Mathboxes > zeroo2 | Structured version Visualization version GIF version | ||
| Description: A zero object is an object in the base set. (Contributed by Zhi Wang, 23-Oct-2025.) |
| Ref | Expression |
|---|---|
| initoo2.b | ⊢ 𝐵 = (Base‘𝐶) |
| Ref | Expression |
|---|---|
| zeroo2 | ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝑂 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zeroorcl 18174 | . . 3 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝐶 ∈ Cat) | |
| 2 | iszeroi 18191 | . . . 4 ⊢ ((𝐶 ∈ Cat ∧ 𝑂 ∈ (ZeroO‘𝐶)) → (𝑂 ∈ (Base‘𝐶) ∧ (𝑂 ∈ (InitO‘𝐶) ∧ 𝑂 ∈ (TermO‘𝐶)))) | |
| 3 | 2 | simpld 500 | . . 3 ⊢ ((𝐶 ∈ Cat ∧ 𝑂 ∈ (ZeroO‘𝐶)) → 𝑂 ∈ (Base‘𝐶)) |
| 4 | 1, 3 | mpancom 701 | . 2 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝑂 ∈ (Base‘𝐶)) |
| 5 | initoo2.b | . 2 ⊢ 𝐵 = (Base‘𝐶) | |
| 6 | 4, 5 | eleqtrrdi 2871 | 1 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝑂 ∈ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ‘cfv 6541 Basecbs 17394 Catccat 17845 InitOcinito 18163 TermOctermo 18164 ZeroOczeroo 18165 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6496 df-fun 6543 df-fv 6549 df-ov 7425 df-inito 18166 df-zeroo 18168 |
| This theorem is used by: oppczeroo 50466 |
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