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| Mirrors > Home > MPE Home > Th. List > Mathboxes > eqvrel0 | Structured version Visualization version GIF version | ||
| Description: The null class is an equivalence relation. (Contributed by Peter Mazsa, 31-Dec-2021.) |
| Ref | Expression |
|---|---|
| eqvrel0 | ⊢ EqvRel ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | disjALTV0 38777 | . . 3 ⊢ Disj ∅ | |
| 2 | 1 | disjimi 38805 | . 2 ⊢ EqvRel ≀ ∅ |
| 3 | coss0 38502 | . . 3 ⊢ ≀ ∅ = ∅ | |
| 4 | 3 | eqvreleqi 38626 | . 2 ⊢ ( EqvRel ≀ ∅ ↔ EqvRel ∅) |
| 5 | 2, 4 | mpbi 230 | 1 ⊢ EqvRel ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∅c0 4313 ≀ ccoss 38204 EqvRel weqvrel 38221 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2708 ax-sep 5271 ax-nul 5281 ax-pr 5407 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2810 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rab 3421 df-v 3466 df-dif 3934 df-un 3936 df-in 3938 df-ss 3948 df-nul 4314 df-if 4506 df-sn 4607 df-pr 4609 df-op 4613 df-br 5125 df-opab 5187 df-id 5553 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-ec 8726 df-coss 38434 df-refrel 38535 df-cnvrefrel 38550 df-symrel 38567 df-trrel 38597 df-eqvrel 38608 df-disjALTV 38728 |
| This theorem is referenced by: (None) |
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