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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 9046 | . . 3 ⊢ (𝐴 ≺ 𝐴 → ¬ 𝐴 ≈ 𝐴) | |
| 2 | enrefg 9049 | . . 3 ⊢ (𝐴 ∈ V → 𝐴 ≈ 𝐴) | |
| 3 | 1, 2 | nsyl3 139 | . 2 ⊢ (𝐴 ∈ V → ¬ 𝐴 ≺ 𝐴) |
| 4 | relsdom 9018 | . . . 4 ⊢ Rel ≺ | |
| 5 | 4 | brrelex1i 5714 | . . 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 |
| This proof depends on syntax axioms: ¬ wn 3 ∈ wcel 2147 Vcvv 3454 class class class wbr 5108 ≈ cen 9008 ≺ csdm 9010 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5255 ax-pow 5334 ax-pr 5398 ax-un 7783 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-en 9012 df-dom 9013 df-sdom 9014 |
| This theorem is used by: sdomn2lp 9173 2pwuninel 9189 2pwne 9190 r111 9819 alephval2 10696 alephom 10709 csdfil 24268 |
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