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| Mirrors > Home > MPE Home > Th. List > issect2 | Structured version Visualization version GIF version | ||
| Description: Property of being a section. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| issect.b | ⊢ 𝐵 = (Base‘𝐶) |
| issect.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| issect.o | ⊢ · = (comp‘𝐶) |
| issect.i | ⊢ 1 = (Id‘𝐶) |
| issect.s | ⊢ 𝑆 = (Sect‘𝐶) |
| issect.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| issect.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| issect.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| issect.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) |
| issect.g | ⊢ (𝜑 → 𝐺 ∈ (𝑌𝐻𝑋)) |
| Ref | Expression |
|---|---|
| issect2 | ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | issect.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) | |
| 2 | issect.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ (𝑌𝐻𝑋)) | |
| 3 | 1, 2 | jca 521 | . 2 ⊢ (𝜑 → (𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋))) |
| 4 | issect.b | . . . 4 ⊢ 𝐵 = (Base‘𝐶) | |
| 5 | issect.h | . . . 4 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 6 | issect.o | . . . 4 ⊢ · = (comp‘𝐶) | |
| 7 | issect.i | . . . 4 ⊢ 1 = (Id‘𝐶) | |
| 8 | issect.s | . . . 4 ⊢ 𝑆 = (Sect‘𝐶) | |
| 9 | issect.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 10 | issect.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 11 | issect.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 12 | 4, 5, 6, 7, 8, 9, 10, 11 | issect 17889 | . . 3 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋) ∧ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋)))) |
| 13 | df-3an 1105 | . . 3 ⊢ ((𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋) ∧ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋)) ↔ ((𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋)) ∧ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋))) | |
| 14 | 12, 13 | bitrdi 290 | . 2 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ ((𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋)) ∧ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋)))) |
| 15 | 3, 14 | mpbirand 720 | 1 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 〈cop 4589 class class class wbr 5102 ‘cfv 6527 (class class class)co 7408 Basecbs 17348 Hom chom 17400 compcco 17401 Catccat 17799 Idccid 17800 Sectcsect 17880 |
| 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-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-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7984 df-2nd 7985 df-sect 17883 |
| This theorem is used by: sectco 17892 dfiso3 17909 monsect 17919 sectid 17922 invcoisoid 17928 isocoinvid 17929 funcsect 18008 fthsect 18063 fucsect 18111 2initoinv 18146 2termoinv 18153 catcisolem 18246 |
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