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| Mirrors > Home > MPE Home > Th. List > Mathboxes > thincsect2 | Structured version Visualization version GIF version | ||
| Description: In a thin category, 𝐹 is a section of 𝐺 iff 𝐺 is a section of 𝐹. Example 7.25(4) of [Adamek] p. 108. (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) |
| Ref | Expression |
|---|---|
| thincsect2 | ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ancom 465 | . . 3 ⊢ ((𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋)) ↔ (𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ 𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌))) | |
| 2 | 1 | a1i 11 | . 2 ⊢ (𝜑 → ((𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋)) ↔ (𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ 𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌)))) |
| 3 | thincsect.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ThinCat) | |
| 4 | thincsect.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 5 | thincsect.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 6 | thincsect.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 7 | thincsect.s | . . 3 ⊢ 𝑆 = (Sect‘𝐶) | |
| 8 | eqid 2762 | . . 3 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 9 | 3, 4, 5, 6, 7, 8 | thincsect 50273 | . 2 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋)))) |
| 10 | 3, 4, 6, 5, 7, 8 | thincsect 50273 | . 2 ⊢ (𝜑 → (𝐺(𝑌𝑆𝑋)𝐹 ↔ (𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ 𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌)))) |
| 11 | 2, 9, 10 | 3bitr4d 314 | 1 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1569 ∈ wcel 2142 class class class wbr 5108 ‘cfv 6536 (class class class)co 7412 Basecbs 17275 Hom chom 17327 Sectcsect 17807 ThinCatcthinc 50223 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7984 df-2nd 7985 df-cat 17730 df-cid 17731 df-sect 17810 df-thinc 50224 |
| This theorem is used by: thincinv 50275 |
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