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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 17846 | . . 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 4593 class class class wbr 5107 ‘cfv 6537 (class class class)co 7416 Basecbs 17305 Hom chom 17357 compcco 17358 Catccat 17756 Idccid 17757 Sectcsect 17837 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 |
| 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 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 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7419 df-oprab 7420 df-mpo 7421 df-1st 7989 df-2nd 7990 df-sect 17840 |
| This theorem is used by: sectco 17849 dfiso3 17866 monsect 17876 sectid 17879 invcoisoid 17885 isocoinvid 17886 funcsect 17965 fthsect 18020 fucsect 18068 2initoinv 18103 2termoinv 18110 catcisolem 18203 |
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