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| Mirrors > Home > ILE Home > Th. List > so2nr | GIF version | ||
| Description: A strict order relation has no 2-cycle loops. (Contributed by NM, 21-Jan-1996.) |
| Ref | Expression |
|---|---|
| so2nr | ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴)) → ¬ (𝐵𝑅𝐶 ∧ 𝐶𝑅𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sopo 4368 | . 2 ⊢ (𝑅 Or 𝐴 → 𝑅 Po 𝐴) | |
| 2 | po2nr 4364 | . 2 ⊢ ((𝑅 Po 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴)) → ¬ (𝐵𝑅𝐶 ∧ 𝐶𝑅𝐵)) | |
| 3 | 1, 2 | sylan 283 | 1 ⊢ ((𝑅 Or 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐶 ∈ 𝐴)) → ¬ (𝐵𝑅𝐶 ∧ 𝐶𝑅𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ∈ wcel 2177 class class class wbr 4051 Po wpo 4349 Or wor 4350 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-ext 2188 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-v 2775 df-un 3174 df-sn 3644 df-pr 3645 df-op 3647 df-br 4052 df-po 4351 df-iso 4352 |
| This theorem is referenced by: sotricim 4378 cauappcvgprlemdisj 7784 cauappcvgprlemladdru 7789 cauappcvgprlemladdrl 7790 caucvgprlemnbj 7800 caucvgprprlemnbj 7826 suplocexprlemmu 7851 ltnsym2 8183 |
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