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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 8923 | . 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 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-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-v 3444 df-dif 3906 df-br 5101 df-sdom 8898 |
| This theorem is referenced by: bren2 8932 domdifsn 9000 sdomnsym 9042 domnsym 9043 sdomirr 9054 domnsymfi 9136 sucdom2 9139 php5 9147 phpeqd 9148 1sdom2dom 9166 pssinf 9174 f1finf1o 9185 isfinite2 9210 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 16618 en2top 22944 domalom 37663 pibt2 37676 rp-isfinite6 43878 ensucne0OLD 43890 iscard5 43896 omiscard 43903 |
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