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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 17962 | . . 3 ⊢ (𝜑 → (ZeroO‘𝐶) = ((InitO‘𝐶) ∩ (TermO‘𝐶))) |
| 5 | 4 | eleq2d 2822 | . 2 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ 𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)))) |
| 6 | elin 3905 | . 2 ⊢ (𝐼 ∈ ((InitO‘𝐶) ∩ (TermO‘𝐶)) ↔ (𝐼 ∈ (InitO‘𝐶) ∧ 𝐼 ∈ (TermO‘𝐶))) | |
| 7 | 5, 6 | bitrdi 287 | 1 ⊢ (𝜑 → (𝐼 ∈ (ZeroO‘𝐶) ↔ (𝐼 ∈ (InitO‘𝐶) ∧ 𝐼 ∈ (TermO‘𝐶)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ∩ cin 3888 ‘cfv 6498 Basecbs 17179 Hom chom 17231 Catccat 17630 InitOcinito 17948 TermOctermo 17949 ZeroOczeroo 17950 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-iota 6454 df-fun 6500 df-fv 6506 df-zeroo 17953 |
| This theorem is referenced by: iszeroi 17976 zrzeroorngc 20621 |
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