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| Mirrors > Home > MPE Home > Th. List > sdomirr | Structured version Visualization version GIF version | ||
| Description: Strict dominance is irreflexive. Theorem 21(i) of [Suppes] p. 97. (Contributed by NM, 4-Jun-1998.) |
| Ref | Expression |
|---|---|
| sdomirr | ⊢ ¬ 𝐴 ≺ 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sdomnen 8977 | . . 3 ⊢ (𝐴 ≺ 𝐴 → ¬ 𝐴 ≈ 𝐴) | |
| 2 | enrefg 8980 | . . 3 ⊢ (𝐴 ∈ V → 𝐴 ≈ 𝐴) | |
| 3 | 1, 2 | nsyl3 139 | . 2 ⊢ (𝐴 ∈ V → ¬ 𝐴 ≺ 𝐴) |
| 4 | relsdom 8949 | . . . 4 ⊢ Rel ≺ | |
| 5 | 4 | brrelex1i 5718 | . . 3 ⊢ (𝐴 ≺ 𝐴 → 𝐴 ∈ V) |
| 6 | 5 | con3i 155 | . 2 ⊢ (¬ 𝐴 ∈ V → ¬ 𝐴 ≺ 𝐴) |
| 7 | 3, 6 | pm2.61i 184 | 1 ⊢ ¬ 𝐴 ≺ 𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∈ wcel 2149 Vcvv 3463 class class class wbr 5113 ≈ cen 8939 ≺ csdm 8941 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pow 5337 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-en 8943 df-dom 8944 df-sdom 8945 |
| This theorem is referenced by: sdomn2lp 9103 2pwuninel 9119 2pwne 9120 r111 9746 alephval2 10556 alephom 10569 csdfil 24019 |
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