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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eqvreldisj4 | Structured version Visualization version GIF version | ||
| Description: Intersection with the converse epsilon relation restricted to the quotient set of an equivalence relation is disjoint. (Contributed by Peter Mazsa, 30-May-2020.) (Revised by Peter Mazsa, 31-Dec-2021.) |
| Ref | Expression |
|---|---|
| eqvreldisj4 | ⊢ ( EqvRel 𝑅 → Disj (𝑆 ∩ (◡ E ↾ (𝐵 / 𝑅)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqvreldisj3 40007 | . 2 ⊢ ( EqvRel 𝑅 → Disj (◡ E ↾ (𝐵 / 𝑅))) | |
| 2 | disjimin 39929 | . 2 ⊢ ( Disj (◡ E ↾ (𝐵 / 𝑅)) → Disj (𝑆 ∩ (◡ E ↾ (𝐵 / 𝑅)))) | |
| 3 | 1, 2 | syl 18 | 1 ⊢ ( EqvRel 𝑅 → Disj (𝑆 ∩ (◡ E ↾ (𝐵 / 𝑅)))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∩ cin 4092 E cep 5554 ◡ccnv 5654 ↾ cres 5657 / cqs 8730 EqvRel weqvrel 39278 Disj wdisjALTV 39297 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-pr 5395 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5171 df-id 5550 df-eprel 5555 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-ec 8733 df-qs 8737 df-coss 39579 df-refrel 39670 df-cnvrefrel 39685 df-symrel 39702 df-trrel 39736 df-eqvrel 39747 df-funALTV 39845 df-disjALTV 39868 df-eldisj 39870 |
| This theorem is used by: (None) |
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