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| Mirrors > Home > MPE Home > Th. List > Mathboxes > br2coss | Structured version Visualization version GIF version | ||
| Description: Cosets by ≀ 𝑅 binary relation. (Contributed by Peter Mazsa, 25-Aug-2019.) |
| Ref | Expression |
|---|---|
| br2coss | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≀ ≀ 𝑅𝐵 ↔ ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) ≠ ∅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brcoss3 38555 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≀ ≀ 𝑅𝐵 ↔ ([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) ≠ ∅)) | |
| 2 | cnvcosseq 38559 | . . . . 5 ⊢ ◡ ≀ 𝑅 = ≀ 𝑅 | |
| 3 | 2 | eceq2i 8670 | . . . 4 ⊢ [𝐴]◡ ≀ 𝑅 = [𝐴] ≀ 𝑅 |
| 4 | 2 | eceq2i 8670 | . . . 4 ⊢ [𝐵]◡ ≀ 𝑅 = [𝐵] ≀ 𝑅 |
| 5 | 3, 4 | ineq12i 4167 | . . 3 ⊢ ([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) = ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) |
| 6 | 5 | neeq1i 2993 | . 2 ⊢ (([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) ≠ ∅ ↔ ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) ≠ ∅) |
| 7 | 1, 6 | bitrdi 287 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≀ ≀ 𝑅𝐵 ↔ ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) ≠ ∅)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2113 ≠ wne 2929 ∩ cin 3897 ∅c0 4282 class class class wbr 5093 ◡ccnv 5618 [cec 8626 ≀ ccoss 38242 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2705 ax-sep 5236 ax-nul 5246 ax-pr 5372 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2712 df-cleq 2725 df-clel 2808 df-ne 2930 df-ral 3049 df-rex 3058 df-rab 3397 df-v 3439 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4475 df-sn 4576 df-pr 4578 df-op 4582 df-br 5094 df-opab 5156 df-xp 5625 df-rel 5626 df-cnv 5627 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-ec 8630 df-coss 38533 |
| This theorem is referenced by: (None) |
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