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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 35672 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≀ ≀ 𝑅𝐵 ↔ ([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) ≠ ∅)) | |
2 | cnvcosseq 35676 | . . . . 5 ⊢ ◡ ≀ 𝑅 = ≀ 𝑅 | |
3 | 2 | eceq2i 8324 | . . . 4 ⊢ [𝐴]◡ ≀ 𝑅 = [𝐴] ≀ 𝑅 |
4 | 2 | eceq2i 8324 | . . . 4 ⊢ [𝐵]◡ ≀ 𝑅 = [𝐵] ≀ 𝑅 |
5 | 3, 4 | ineq12i 4187 | . . 3 ⊢ ([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) = ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) |
6 | 5 | neeq1i 3080 | . 2 ⊢ (([𝐴]◡ ≀ 𝑅 ∩ [𝐵]◡ ≀ 𝑅) ≠ ∅ ↔ ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) ≠ ∅) |
7 | 1, 6 | syl6bb 289 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ≀ ≀ 𝑅𝐵 ↔ ([𝐴] ≀ 𝑅 ∩ [𝐵] ≀ 𝑅) ≠ ∅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∈ wcel 2110 ≠ wne 3016 ∩ cin 3935 ∅c0 4291 class class class wbr 5059 ◡ccnv 5549 [cec 8281 ≀ ccoss 35447 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pr 5322 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3497 df-sbc 3773 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-br 5060 df-opab 5122 df-xp 5556 df-rel 5557 df-cnv 5558 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-ec 8285 df-coss 35653 |
This theorem is referenced by: (None) |
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