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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 8931 | . 2 ⊢ (𝐴 ≼ 𝐵 ↔ (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵)) | |
| 2 | sdomnsym 9042 | . . 3 ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐵 ≺ 𝐴) | |
| 3 | sdomnen 8930 | . . . 4 ⊢ (𝐵 ≺ 𝐴 → ¬ 𝐵 ≈ 𝐴) | |
| 4 | ensym 8952 | . . . 4 ⊢ (𝐴 ≈ 𝐵 → 𝐵 ≈ 𝐴) | |
| 5 | 3, 4 | nsyl3 138 | . . 3 ⊢ (𝐴 ≈ 𝐵 → ¬ 𝐵 ≺ 𝐴) |
| 6 | 2, 5 | jaoi 858 | . 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 848 class class class wbr 5100 ≈ cen 8892 ≼ cdom 8893 ≺ csdm 8894 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 |
| This theorem is referenced by: sdomdomtr 9050 domsdomtr 9052 sdomdif 9065 onsdominel 9066 fofinf1o 9244 carddom2 9901 fidomtri 9917 fidomtri2 9918 infxpenlem 9935 alephordi 9996 infdif 10130 infdif2 10131 cfslbn 10189 cfslb2n 10190 fincssdom 10245 fin45 10314 domtriom 10365 alephval2 10495 alephreg 10505 pwcfsdom 10506 cfpwsdom 10507 pwfseqlem3 10583 gchpwdom 10593 gchaleph 10594 hargch 10596 gchhar 10602 winainflem 10616 rankcf 10700 tskcard 10704 vdwlem12 16932 odinf 19504 rectbntr0 24789 erdszelem10 35416 finminlem 36534 fimgmcyc 42904 fphpd 43173 |
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