| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5638 | . 2 ⊢ 𝑅 Fr ∅ | |
| 2 | so0 5606 | . 2 ⊢ 𝑅 Or ∅ | |
| 3 | df-we 5615 | . 2 ⊢ (𝑅 We ∅ ↔ (𝑅 Fr ∅ ∧ 𝑅 Or ∅)) | |
| 4 | 1, 2, 3 | mpbir2an 723 | 1 ⊢ 𝑅 We ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∅c0 4285 Or wor 5567 Fr wfr 5610 We wwe 5612 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-br 5109 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 |
| This theorem is used by: ord0 6415 cantnf0 9642 cantnf 9660 wemapwe 9664 ltweuz 14004 |
| Copyright terms: Public domain | W3C validator |