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| Mirrors > Home > MPE Home > Th. List > sdomn2lp | Structured version Visualization version GIF version | ||
| Description: Strict dominance has no 2-cycle loops. (Contributed by NM, 6-May-2008.) |
| Ref | Expression |
|---|---|
| sdomn2lp | ⊢ ¬ (𝐴 ≺ 𝐵 ∧ 𝐵 ≺ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sdomirr 9134 | . 2 ⊢ ¬ 𝐴 ≺ 𝐴 | |
| 2 | sdomtr 9135 | . 2 ⊢ ((𝐴 ≺ 𝐵 ∧ 𝐵 ≺ 𝐴) → 𝐴 ≺ 𝐴) | |
| 3 | 1, 2 | mto 200 | 1 ⊢ ¬ (𝐴 ≺ 𝐵 ∧ 𝐵 ≺ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ∧ wa 401 class class class wbr 5102 ≺ csdm 8973 |
| 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-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| 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-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 |
| This theorem is used by: (None) |
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