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| Mirrors > Home > ILE Home > Th. List > ltso | GIF version | ||
| Description: 'Less than' is a strict ordering. (Contributed by NM, 19-Jan-1997.) |
| Ref | Expression |
|---|---|
| ltso | ⊢ < Or ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltnr 8120 | . . . . 5 ⊢ (𝑥 ∈ ℝ → ¬ 𝑥 < 𝑥) | |
| 2 | 1 | adantl 277 | . . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ) → ¬ 𝑥 < 𝑥) |
| 3 | lttr 8117 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → ((𝑥 < 𝑦 ∧ 𝑦 < 𝑧) → 𝑥 < 𝑧)) | |
| 4 | 3 | adantl 277 | . . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ)) → ((𝑥 < 𝑦 ∧ 𝑦 < 𝑧) → 𝑥 < 𝑧)) |
| 5 | 2, 4 | ispod 4340 | . . 3 ⊢ (⊤ → < Po ℝ) |
| 6 | 5 | mptru 1373 | . 2 ⊢ < Po ℝ |
| 7 | axltwlin 8111 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦))) | |
| 8 | 7 | rgen3 2584 | . 2 ⊢ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ∀𝑧 ∈ ℝ (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)) |
| 9 | df-iso 4333 | . 2 ⊢ ( < Or ℝ ↔ ( < Po ℝ ∧ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ∀𝑧 ∈ ℝ (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)))) | |
| 10 | 6, 8, 9 | mpbir2an 944 | 1 ⊢ < Or ℝ |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ∨ wo 709 ∧ w3a 980 ⊤wtru 1365 ∈ wcel 2167 ∀wral 2475 class class class wbr 4034 Po wpo 4330 Or wor 4331 ℝcr 7895 < clt 8078 |
| 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-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-cnex 7987 ax-resscn 7988 ax-pre-ltirr 8008 ax-pre-ltwlin 8009 ax-pre-lttrn 8010 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-nel 2463 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-po 4332 df-iso 4333 df-xp 4670 df-pnf 8080 df-mnf 8081 df-ltxr 8083 |
| This theorem is referenced by: gtso 8122 ltnsym2 8134 suprlubex 8996 fimaxq 10936 |
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