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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 39099 | . . 3 ⊢ Disj ∅ | |
| 2 | 1 | disjimi 39130 | . 2 ⊢ EqvRel ≀ ∅ |
| 3 | coss0 38814 | . . 3 ⊢ ≀ ∅ = ∅ | |
| 4 | 3 | eqvreleqi 38932 | . 2 ⊢ ( EqvRel ≀ ∅ ↔ EqvRel ∅) |
| 5 | 2, 4 | mpbi 230 | 1 ⊢ EqvRel ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∅c0 4287 ≀ ccoss 38428 EqvRel weqvrel 38445 |
| 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-sep 5243 ax-pr 5379 |
| 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-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 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-ec 8647 df-coss 38746 df-refrel 38837 df-cnvrefrel 38852 df-symrel 38869 df-trrel 38903 df-eqvrel 38914 df-disjALTV 39035 |
| This theorem is referenced by: (None) |
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