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| Mirrors > Home > MPE Home > Th. List > sdomnen | Structured version Visualization version GIF version | ||
| Description: Strict dominance implies non-equinumerosity. (Contributed by NM, 10-Jun-1998.) |
| Ref | Expression |
|---|---|
| sdomnen | ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐴 ≈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brsdom 8921 | . 2 ⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵)) | |
| 2 | 1 | simprbi 497 | 1 ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐴 ≈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 class class class wbr 5085 ≈ cen 8890 ≼ cdom 8891 ≺ csdm 8892 |
| 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-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-v 3431 df-dif 3892 df-br 5086 df-sdom 8896 |
| This theorem is referenced by: bren2 8930 domdifsn 8998 sdomnsym 9040 domnsym 9041 sdomirr 9052 domnsymfi 9134 sucdom2 9137 php5 9145 phpeqd 9146 1sdom2dom 9164 pssinf 9172 f1finf1o 9183 isfinite2 9208 cardom 9910 pm54.43 9925 alephdom 10003 cdainflem 10110 ackbij1b 10160 isfin4p1 10237 fin23lem25 10246 fin67 10317 axcclem 10379 canthp1lem2 10576 gchinf 10580 pwfseqlem4 10585 tskssel 10680 1nprm 16648 en2top 22950 domalom 37720 pibt2 37733 rp-isfinite6 43945 ensucne0OLD 43957 iscard5 43963 omiscard 43970 |
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