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| Mirrors > Home > ILE Home > Th. List > ltrel | GIF version | ||
| Description: 'Less than' is a relation. (Contributed by NM, 14-Oct-2005.) |
| Ref | Expression |
|---|---|
| ltrel | ⊢ Rel < |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltrelxr 8330 | . 2 ⊢ < ⊆ (ℝ* × ℝ*) | |
| 2 | relxp 4858 | . 2 ⊢ Rel (ℝ* × ℝ*) | |
| 3 | relss 4836 | . 2 ⊢ ( < ⊆ (ℝ* × ℝ*) → (Rel (ℝ* × ℝ*) → Rel < )) | |
| 4 | 1, 2, 3 | mp2 16 | 1 ⊢ Rel < |
| Colors of variables: wff set class |
| Syntax hints: ⊆ wss 3210 × cxp 4746 Rel wrel 4753 ℝ*cxr 8303 < clt 8304 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2814 df-un 3214 df-in 3216 df-ss 3223 df-pr 3695 df-opab 4171 df-xp 4754 df-rel 4755 df-xr 8308 df-ltxr 8309 |
| This theorem is referenced by: (None) |
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