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| Mirrors > Home > MPE Home > Th. List > Mathboxes > thincinv | Structured version Visualization version GIF version | ||
| Description: In a thin category, 𝐹 is an inverse of 𝐺 iff 𝐹 is a section of 𝐺. Example 7.20(7) of [Adamek] p. 107. (Contributed by Zhi Wang, 24-Sep-2024.) |
| Ref | Expression |
|---|---|
| thincsect.c | ⊢ (𝜑 → 𝐶 ∈ ThinCat) |
| thincsect.b | ⊢ 𝐵 = (Base‘𝐶) |
| thincsect.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| thincsect.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| thincsect.s | ⊢ 𝑆 = (Sect‘𝐶) |
| thincinv.n | ⊢ 𝑁 = (Inv‘𝐶) |
| Ref | Expression |
|---|---|
| thincinv | ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐹(𝑋𝑆𝑌)𝐺)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | thincsect.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | thincinv.n | . . 3 ⊢ 𝑁 = (Inv‘𝐶) | |
| 3 | thincsect.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ThinCat) | |
| 4 | 3 | thinccatd 50453 | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 5 | thincsect.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 6 | thincsect.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 7 | thincsect.s | . . 3 ⊢ 𝑆 = (Sect‘𝐶) | |
| 8 | 1, 2, 4, 5, 6, 7 | isinv 17896 | . 2 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋𝑆𝑌)𝐺 ∧ 𝐺(𝑌𝑆𝑋)𝐹))) |
| 9 | 3, 1, 5, 6, 7 | thincsect2 50498 | . . 3 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹)) |
| 10 | 9 | biimpa 482 | . 2 ⊢ ((𝜑 ∧ 𝐹(𝑋𝑆𝑌)𝐺) → 𝐺(𝑌𝑆𝑋)𝐹) |
| 11 | 8, 10 | mpbiran3d 49829 | 1 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐹(𝑋𝑆𝑌)𝐺)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 class class class wbr 5102 ‘cfv 6527 (class class class)co 7408 Basecbs 17348 Sectcsect 17880 Invcinv 17881 ThinCatcthinc 50447 |
| 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-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 |
| 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-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7984 df-2nd 7985 df-cat 17803 df-cid 17804 df-sect 17883 df-inv 17884 df-thinc 50448 |
| This theorem is used by: (None) |
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