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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 460 | . . 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 2737 | . . 3 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 9 | 3, 4, 5, 6, 7, 8 | thincsect 49958 | . 2 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌) ∧ 𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋)))) |
| 10 | 3, 4, 6, 5, 7, 8 | thincsect 49958 | . 2 ⊢ (𝜑 → (𝐺(𝑌𝑆𝑋)𝐹 ↔ (𝐺 ∈ (𝑌(Hom ‘𝐶)𝑋) ∧ 𝐹 ∈ (𝑋(Hom ‘𝐶)𝑌)))) |
| 11 | 2, 9, 10 | 3bitr4d 311 | 1 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ 𝐺(𝑌𝑆𝑋)𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5086 ‘cfv 6494 (class class class)co 7362 Basecbs 17174 Hom chom 17226 Sectcsect 17706 ThinCatcthinc 49908 |
| 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 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5304 ax-pr 5372 ax-un 7684 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5521 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-iota 6450 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-riota 7319 df-ov 7365 df-oprab 7366 df-mpo 7367 df-1st 7937 df-2nd 7938 df-cat 17629 df-cid 17630 df-sect 17709 df-thinc 49909 |
| This theorem is referenced by: thincinv 49960 |
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