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| Mirrors > Home > MPE Home > Th. List > iszeroo | Structured version Visualization version GIF version | ||
| Description: The predicate "is a zero object" of a category. (Contributed by AV, 3-Apr-2020.) |
| Ref | Expression |
|---|---|
| isinito.b | ⊢ 𝐵 = (Base‘𝐶) |
| isinito.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| isinito.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| isinito.i | ⊢ (𝜑 → 𝐼 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| iszeroo | ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ (𝐼 ∈ (InitO‘𝐶) ∧ 𝐼 ∈ (TermO‘𝐶)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isinito.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 2 | isinito.b | . . . 4 ⊢ 𝐵 = (Base‘𝐶) | |
| 3 | isinito.h | . . . 4 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 4 | 1, 2, 3 | zerooval 18047 | . . 3 ⊢ (𝜑 → (ZeroO‘𝐶) = ((InitO‘𝐶) ∩ (TermO‘𝐶))) |
| 5 | 4 | eleq2d 2849 | . 2 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ 𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)))) |
| 6 | elin 3921 | . 2 ⊢ (𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)) ↔ (𝐼 ∈ (InitO‘𝐶) ∧ 𝐼 ∈ (TermO‘𝐶))) | |
| 7 | 5, 6 | bitrdi 290 | 1 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ (𝐼 ∈ (InitO‘𝐶) ∧ 𝐼 ∈ (TermO‘𝐶)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ∩ cin 3904 ‘cfv 6536 Basecbs 17264 Hom chom 17316 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-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-iota 6492 df-fun 6538 df-fv 6544 df-zeroo 18038 |
| This theorem is referenced by: iszeroi 18061 zrzeroorngc 20743 |
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