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| Mirrors > Home > MPE Home > Th. List > sonr | Structured version Visualization version GIF version | ||
| Description: A strict order relation is irreflexive. (Contributed by NM, 24-Nov-1995.) |
| Ref | Expression |
|---|---|
| sonr | ⊢ ((𝑅 Or 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sopo 5577 | . 2 ⊢ (𝑅 Or 𝐴 → 𝑅 Po 𝐴) | |
| 2 | poirr 5570 | . 2 ⊢ ((𝑅 Po 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵) | |
| 3 | 1, 2 | sylan 592 | 1 ⊢ ((𝑅 Or 𝐴 ∧ 𝐵 ∈ 𝐴) → ¬ 𝐵𝑅𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∈ wcel 2144 class class class wbr 5102 Po wpo 5556 Or wor 5557 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-po 5558 df-so 5559 |
| This theorem is used by: sotric 5588 sotrieq 5589 soirri 6119 suppr 9467 infpr 9500 hartogslem1 9539 canth4 10735 canthwelem 10738 pwfseqlem4 10750 1ne0sr 11184 ltnr 11408 opsrtoslem2 22370 nodenselem4 28049 nodenselem5 28050 nodenselem7 28052 nolt02o 28057 nogt01o 28058 noresle 28059 nosupbnd1lem1 28070 nosupbnd2lem1 28077 noinfbnd1lem1 28085 noinfbnd2lem1 28092 ltsirr 28108 weiunpo 37345 fin2solem 38622 fin2so 38623 |
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