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| Mirrors > Home > MPE Home > Th. List > domnsym | Structured version Visualization version GIF version | ||
| Description: Theorem 22(i) of [Suppes] p. 97. (Contributed by NM, 10-Jun-1998.) |
| Ref | Expression |
|---|---|
| domnsym | ⊢ (𝐴 ≼ 𝐵 → ¬ 𝐵 ≺ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brdom2 8953 | . 2 ⊢ (𝐴 ≼ 𝐵 ↔ (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵)) | |
| 2 | sdomnsym 9066 | . . 3 ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐵 ≺ 𝐴) | |
| 3 | sdomnen 8952 | . . . 4 ⊢ (𝐵 ≺ 𝐴 → ¬ 𝐵 ≈ 𝐴) | |
| 4 | ensym 8974 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
| 5 | 3, 4 | nsyl3 138 | . . 3 ⊢ (𝐴 ≈ 𝐵 → ¬ 𝐵 ≺ 𝐴) |
| 6 | 2, 5 | jaoi 857 | . 2 ⊢ ((𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵) → ¬ 𝐵 ≺ 𝐴) |
| 7 | 1, 6 | sylbi 217 | 1 ⊢ (𝐴 ≼ 𝐵 → ¬ 𝐵 ≺ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∨ wo 847 class class class wbr 5107 ≈ cen 8915 ≼ cdom 8916 ≺ csdm 8917 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-br 5108 df-opab 5170 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 |
| This theorem is referenced by: sdomdomtr 9074 domsdomtr 9076 sdomdif 9089 onsdominel 9090 sdom1OLD 9190 fofinf1o 9283 carddom2 9930 fidomtri 9946 fidomtri2 9947 infxpenlem 9966 alephordi 10027 infdif 10161 infdif2 10162 cfslbn 10220 cfslb2n 10221 fincssdom 10276 fin45 10345 domtriom 10396 alephval2 10525 alephreg 10535 pwcfsdom 10536 cfpwsdom 10537 pwfseqlem3 10613 gchpwdom 10623 gchaleph 10624 hargch 10626 gchhar 10632 winainflem 10646 rankcf 10730 tskcard 10734 vdwlem12 16963 odinf 19493 rectbntr0 24721 erdszelem10 35187 finminlem 36306 fimgmcyc 42522 fphpd 42804 |
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