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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 8923 | . 2 ⊢ (𝐴 ≼ 𝐵 ↔ (𝐴 ≺ 𝐵 ∨ 𝐴 ≈ 𝐵)) | |
| 2 | sdomnsym 9034 | . . 3 ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐵 ≺ 𝐴) | |
| 3 | sdomnen 8922 | . . . 4 ⊢ (𝐵 ≺ 𝐴 → ¬ 𝐵 ≈ 𝐴) | |
| 4 | ensym 8944 | . . . 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 5099 ≈ cen 8884 ≼ cdom 8885 ≺ csdm 8886 |
| 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 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 |
| 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 3062 df-rab 3401 df-v 3443 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-br 5100 df-opab 5162 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 |
| This theorem is referenced by: sdomdomtr 9042 domsdomtr 9044 sdomdif 9057 onsdominel 9058 fofinf1o 9236 carddom2 9893 fidomtri 9909 fidomtri2 9910 infxpenlem 9927 alephordi 9988 infdif 10122 infdif2 10123 cfslbn 10181 cfslb2n 10182 fincssdom 10237 fin45 10306 domtriom 10357 alephval2 10487 alephreg 10497 pwcfsdom 10498 cfpwsdom 10499 pwfseqlem3 10575 gchpwdom 10585 gchaleph 10586 hargch 10588 gchhar 10594 winainflem 10608 rankcf 10692 tskcard 10696 vdwlem12 16924 odinf 19496 rectbntr0 24781 erdszelem10 35375 finminlem 36493 fimgmcyc 42825 fphpd 43094 |
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