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| Mirrors > Home > MPE Home > Th. List > ltrel | Structured version Visualization version GIF version | ||
| Description: "Less than" is a relation. (Contributed by NM, 14-Oct-2005.) |
| Ref | Expression |
|---|---|
| ltrel | ⊢ Rel < |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltrelxr 11377 | . 2 ⊢ < ⊆ (ℝ* × ℝ*) | |
| 2 | relxp 5669 | . 2 ⊢ Rel (ℝ* × ℝ*) | |
| 3 | relss 5759 | . 2 ⊢ ( < ⊆ (ℝ* × ℝ*) → (Rel (ℝ* × ℝ*) → Rel < )) | |
| 4 | 1, 2, 3 | mp2 9 | 1 ⊢ Rel < |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ⊆ wss 3896 × cxp 5649 Rel wrel 5656 ℝ*cxr 11349 < clt 11350 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-v 3452 df-ss 3897 df-un 4150 df-pr 4587 df-opab 5167 df-xp 5657 df-rel 5658 df-xr 11354 df-ltxr 11355 |
| This theorem is used by: dflt2 13284 gtiso 33345 |
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