Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
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 7834 | . . . . 5 ⊢ (𝑥 ∈ ℝ → ¬ 𝑥 < 𝑥) | |
2 | 1 | adantl 275 | . . . 4 ⊢ ((⊤ ∧ 𝑥 ∈ ℝ) → ¬ 𝑥 < 𝑥) |
3 | lttr 7831 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → ((𝑥 < 𝑦 ∧ 𝑦 < 𝑧) → 𝑥 < 𝑧)) | |
4 | 3 | adantl 275 | . . . 4 ⊢ ((⊤ ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ)) → ((𝑥 < 𝑦 ∧ 𝑦 < 𝑧) → 𝑥 < 𝑧)) |
5 | 2, 4 | ispod 4221 | . . 3 ⊢ (⊤ → < Po ℝ) |
6 | 5 | mptru 1340 | . 2 ⊢ < Po ℝ |
7 | axltwlin 7825 | . . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑧 ∈ ℝ) → (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦))) | |
8 | 7 | rgen3 2517 | . 2 ⊢ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ∀𝑧 ∈ ℝ (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)) |
9 | df-iso 4214 | . 2 ⊢ ( < Or ℝ ↔ ( < Po ℝ ∧ ∀𝑥 ∈ ℝ ∀𝑦 ∈ ℝ ∀𝑧 ∈ ℝ (𝑥 < 𝑦 → (𝑥 < 𝑧 ∨ 𝑧 < 𝑦)))) | |
10 | 6, 8, 9 | mpbir2an 926 | 1 ⊢ < Or ℝ |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ∨ wo 697 ∧ w3a 962 ⊤wtru 1332 ∈ wcel 1480 ∀wral 2414 class class class wbr 3924 Po wpo 4211 Or wor 4212 ℝcr 7612 < clt 7793 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-setind 4447 ax-cnex 7704 ax-resscn 7705 ax-pre-ltirr 7725 ax-pre-ltwlin 7726 ax-pre-lttrn 7727 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-rex 2420 df-rab 2423 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-opab 3985 df-po 4213 df-iso 4214 df-xp 4540 df-pnf 7795 df-mnf 7796 df-ltxr 7798 |
This theorem is referenced by: gtso 7836 ltnsym2 7847 suprlubex 8703 fimaxq 10566 |
Copyright terms: Public domain | W3C validator |