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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 520 | . 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 17816 | . . 3 ⊢ (𝜑 → (𝐹(𝑋𝑆𝑌)𝐺 ↔ (𝐹 ∈ (𝑋𝐻𝑌) ∧ 𝐺 ∈ (𝑌𝐻𝑋) ∧ (𝐺(〈𝑋, 𝑌〉 · 𝑋)𝐹) = ( 1 ‘𝑋)))) |
| 13 | df-3an 1104 | . . 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 719 | 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 400 ∧ w3a 1102 = wceq 1569 ∈ wcel 2142 〈cop 4594 class class class wbr 5108 ‘cfv 6536 (class class class)co 7412 Basecbs 17275 Hom chom 17327 compcco 17328 Catccat 17726 Idccid 17727 Sectcsect 17807 |
| 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-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-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7984 df-2nd 7985 df-sect 17810 |
| This theorem is used by: sectco 17819 dfiso3 17836 monsect 17846 sectid 17849 invcoisoid 17855 isocoinvid 17856 funcsect 17935 fthsect 17990 fucsect 18038 2initoinv 18073 2termoinv 18080 catcisolem 18173 |
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