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| Mirrors > Home > MPE Home > Th. List > invsym | Structured version Visualization version GIF version | ||
| Description: The inverse relation is symmetric. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| invfval.b | ⊢ 𝐵 = (Base‘𝐶) |
| invfval.n | ⊢ 𝑁 = (Inv‘𝐶) |
| invfval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| invss.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| invss.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| invsym | ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐺(𝑌𝑁𝑋)𝐹)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | invfval.b | . . . 4 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | invfval.n | . . . 4 ⊢ 𝑁 = (Inv‘𝐶) | |
| 3 | invfval.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | invss.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | invss.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 6 | eqid 2737 | . . . 4 ⊢ (Sect‘𝐶) = (Sect‘𝐶) | |
| 7 | 1, 2, 3, 4, 5, 6 | isinv 17696 | . . 3 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐹(𝑋(Sect‘𝐶)𝑌)𝐺 ∧ 𝐺(𝑌(Sect‘𝐶)𝑋)𝐹))) |
| 8 | 7 | biancomd 463 | . 2 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ (𝐺(𝑌(Sect‘𝐶)𝑋)𝐹 ∧ 𝐹(𝑋(Sect‘𝐶)𝑌)𝐺))) |
| 9 | 1, 2, 3, 5, 4, 6 | isinv 17696 | . 2 ⊢ (𝜑 → (𝐺(𝑌𝑁𝑋)𝐹 ↔ (𝐺(𝑌(Sect‘𝐶)𝑋)𝐹 ∧ 𝐹(𝑋(Sect‘𝐶)𝑌)𝐺))) |
| 10 | 8, 9 | bitr4d 282 | 1 ⊢ (𝜑 → (𝐹(𝑋𝑁𝑌)𝐺 ↔ 𝐺(𝑌𝑁𝑋)𝐹)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5100 ‘cfv 6500 (class class class)co 7368 Basecbs 17148 Catccat 17599 Sectcsect 17680 Invcinv 17681 |
| 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 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| 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-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-oprab 7372 df-mpo 7373 df-1st 7943 df-2nd 7944 df-sect 17683 df-inv 17684 |
| This theorem is referenced by: invsym2 17699 inviso2 17703 invisoinvl 17726 invisoinvr 17727 |
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