| Mathbox for Zhi Wang |
< Previous
Next >
Nearby theorems |
||
| 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 18044 | . . 3 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝐶 ∈ Cat) | |
| 2 | iszeroi 18061 | . . . 4 ⊢ ((𝐶 ∈ Cat ∧ 𝑂 ∈ (ZeroO‘𝐶)) → (𝑂 ∈ (Base‘𝐶) ∧ (𝑂 ∈ (InitO‘𝐶) ∧ 𝑂 ∈ (TermO‘𝐶)))) | |
| 3 | 2 | simpld 499 | . . 3 ⊢ ((𝐶 ∈ Cat ∧ 𝑂 ∈ (ZeroO‘𝐶)) → 𝑂 ∈ (Base‘𝐶)) |
| 4 | 1, 3 | mpancom 700 | . 2 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝑂 ∈ (Base‘𝐶)) |
| 5 | initoo2.b | . 2 ⊢ 𝐵 = (Base‘𝐶) | |
| 6 | 4, 5 | eleqtrrdi 2874 | 1 ⊢ (𝑂 ∈ (ZeroO‘𝐶) → 𝑂 ∈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ‘cfv 6536 Basecbs 17264 Catccat 17715 InitOcinito 18033 TermOctermo 18034 ZeroOczeroo 18035 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fv 6544 df-ov 7413 df-inito 18036 df-zeroo 18038 |
| This theorem is referenced by: oppczeroo 50015 |
| Copyright terms: Public domain | W3C validator |