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| Mirrors > Home > ILE Home > Th. List > poirr | GIF version | ||
| Description: A partial order relation is irreflexive. (Contributed by NM, 27-Mar-1997.) |
| Ref | Expression |
|---|---|
| poirr | ⊢ ((𝑅 Po 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3an 982 | . . 3 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ↔ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ∧ 𝐵 ∈ 𝐴)) | |
| 2 | anabs1 572 | . . 3 ⊢ (((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ∧ 𝐵 ∈ 𝐴) ↔ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) | |
| 3 | anidm 396 | . . 3 ⊢ ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) ↔ 𝐵 ∈ 𝐴) | |
| 4 | 1, 2, 3 | 3bitrri 207 | . 2 ⊢ (𝐵 ∈ 𝐴 ↔ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) |
| 5 | pocl 4338 | . . . 4 ⊢ (𝑅 Po 𝐴 → ((𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐵 ∧ 𝐵𝑅𝐵) → 𝐵𝑅𝐵)))) | |
| 6 | 5 | imp 124 | . . 3 ⊢ ((𝑅 Po 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) → (¬ 𝐵𝑅𝐵 ∧ ((𝐵𝑅𝐵 ∧ 𝐵𝑅𝐵) → 𝐵𝑅𝐵))) |
| 7 | 6 | simpld 112 | . 2 ⊢ ((𝑅 Po 𝐴 ∧ (𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴 ∧ 𝐵 ∈ 𝐴)) → ¬ 𝐵𝑅𝐵) |
| 8 | 4, 7 | sylan2b 287 | 1 ⊢ ((𝑅 Po 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 104 ∧ w3a 980 ∈ wcel 2167 class class class wbr 4033 Po wpo 4329 |
| 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-ext 2178 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-v 2765 df-un 3161 df-sn 3628 df-pr 3629 df-op 3631 df-br 4034 df-po 4331 |
| This theorem is referenced by: po2nr 4344 pofun 4347 sonr 4352 poirr2 5062 poxp 6290 swoer 6620 tridc 6960 fimax2gtrilemstep 6961 |
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