| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: 'Less than' is a relation on real numbers. |
| Ref | Expression |
|---|---|
| ltrelre | ⊢ < ⊆ (ℝ × ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-lt 4041 | . 2 ⊢ < = {〈x, y〉∣((x ∈ ℝ ∧ y ∈ ℝ) ∧ ∃z∃w((x = 〈z, 0R〉 ∧ y = 〈w, 0R〉) ∧ z <R w))} | |
| 2 | opabssxp 2468 | . 2 ⊢ {〈x, y〉∣((x ∈ ℝ ∧ y ∈ ℝ) ∧ ∃z∃w((x = 〈z, 0R〉 ∧ y = 〈w, 0R〉) ∧ z <R w))} ⊆ (ℝ × ℝ) | |
| 3 | 1, 2 | eqsstr 1530 | 1 ⊢ < ⊆ (ℝ × ℝ) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 196 ∃wex 678 = wceq 1091 ∈ wcel 1092 ⊆ wss 1487 〈cop 1810 class class class wbr 2054 {copab 2055 × cxp 2408 0Rc0r 3788 <R cltr 3793 ℝcr 4027 < clt 4033 |
| This theorem is referenced by: ltresr 4052 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-opab 2098 df-xp 2424 df-lt 4041 |