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| Mirrors > Home > MPE Home > Th. List > we0 | Structured version Visualization version GIF version | ||
| Description: Any relation is a well-ordering of the empty set. (Contributed by NM, 16-Mar-1997.) |
| Ref | Expression |
|---|---|
| we0 | ⊢ 𝑅 We ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fr0 5625 | . 2 ⊢ 𝑅 Fr ∅ | |
| 2 | so0 5593 | . 2 ⊢ 𝑅 Or ∅ | |
| 3 | df-we 5602 | . 2 ⊢ (𝑅 We ∅ ↔ (𝑅 Fr ∅ ∧ 𝑅 Or ∅)) | |
| 4 | 1, 2, 3 | mpbir2an 724 | 1 ⊢ 𝑅 We ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∅c0 4278 Or wor 5554 Fr wfr 5597 We wwe 5599 |
| 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 2147 ax-9 2155 ax-ext 2732 |
| 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-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3901 df-un 3903 df-ss 3915 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5103 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 |
| This theorem is used by: ord0 6406 cantnf0 9654 cantnf 9672 wemapwe 9676 ltweuz 14073 |
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