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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 18182 | . . 3 ⊢ (𝜑 → (ZeroO‘𝐶) = ((InitO‘𝐶) ∩ (TermO‘𝐶))) |
| 5 | 4 | eleq2d 2849 | . 2 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ 𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)))) |
| 6 | elin 4095 | . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1569 ∈ wcel 2146 ∩ cin 4091 ‘cfv 6546 Basecbs 17399 Hom chom 17451 Catccat 17850 InitOcinito 18168 TermOctermo 18169 ZeroOczeroo 18170 |
| 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 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-nul 5262 ax-pr 5394 |
| 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 2101 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 3416 df-v 3455 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-br 5106 df-opab 5170 df-mpt 5189 df-id 5549 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-iota 6500 df-fun 6548 df-fv 6554 df-zeroo 18173 |
| This theorem is used by: iszeroi 18196 zrzeroorngc 20908 |
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