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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 9001 | . 2 ⊢ (𝐴 ≺ 𝐵 ↔ (𝐴 ≼ 𝐵 ∧ ¬ 𝐴 ≈ 𝐵)) | |
| 2 | 1 | simprbi 503 | 1 ⊢ (𝐴 ≺ 𝐵 → ¬ 𝐴 ≈ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 class class class wbr 5103 ≈ cen 8970 ≼ cdom 8971 ≺ csdm 8972 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-v 3453 df-dif 3902 df-br 5104 df-sdom 8976 |
| This theorem is used by: bren2 9010 domdifsn 9079 sdomnsym 9121 domnsym 9122 sdomirr 9133 domnsymfi 9215 sucdom2 9218 php5 9226 phpeqd 9227 1sdom2dom 9245 pssinf 9253 f1finf1o 9264 isfinite2 9290 cardom 10067 pm54.43 10082 alephdom 10160 cdainflem 10266 ackbij1b 10316 isfin4p1 10393 fin23lem25 10402 fin67 10473 axcclem 10535 canthp1lem2 10738 gchinf 10742 pwfseqlem4 10747 tskssel 10842 1nprm 16854 en2top 23303 domalom 38327 pibt2 38340 rp-isfinite6 44518 ensucne0OLD 44530 iscard5 44536 omiscard 44543 |
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