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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 18085 | . . 3 ⊢ (𝜑 → (ZeroO‘𝐶) = ((InitO‘𝐶) ∩ (TermO‘𝐶))) |
| 5 | 4 | eleq2d 2846 | . 2 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ 𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)))) |
| 6 | elin 3915 | . 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 1570 ∈ wcel 2145 ∩ cin 3898 ‘cfv 6533 Basecbs 17302 Hom chom 17354 Catccat 17753 InitOcinito 18071 TermOctermo 18072 ZeroOczeroo 18073 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pr 5398 |
| 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 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-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fv 6541 df-zeroo 18076 |
| This theorem is used by: iszeroi 18099 zrzeroorngc 20807 |
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