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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 39543 | . . 3 ⊢ Disj ∅ | |
| 2 | 1 | disjimi 39574 | . 2 ⊢ EqvRel ≀ ∅ |
| 3 | coss0 39258 | . . 3 ⊢ ≀ ∅ = ∅ | |
| 4 | 3 | eqvreleqi 39376 | . 2 ⊢ ( EqvRel ≀ ∅ ↔ EqvRel ∅) |
| 5 | 2, 4 | mpbi 233 | 1 ⊢ EqvRel ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∅c0 4289 ≀ ccoss 38872 EqvRel weqvrel 38889 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-ec 8705 df-coss 39190 df-refrel 39281 df-cnvrefrel 39296 df-symrel 39313 df-trrel 39347 df-eqvrel 39358 df-disjALTV 39479 |
| This theorem is used by: (None) |
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