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| Mirrors > Home > MPE Home > Th. List > ltnlei | Structured version Visualization version GIF version | ||
| Description: 'Less than' in terms of 'less than or equal to'. (Contributed by NM, 11-Jul-2005.) |
| Ref | Expression |
|---|---|
| lt.1 | ⊢ 𝐴 ∈ ℝ |
| lt.2 | ⊢ 𝐵 ∈ ℝ |
| Ref | Expression |
|---|---|
| ltnlei | ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lt.2 | . . 3 ⊢ 𝐵 ∈ ℝ | |
| 2 | lt.1 | . . 3 ⊢ 𝐴 ∈ ℝ | |
| 3 | 1, 2 | lenlti 11251 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 357 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 206 ∈ wcel 2113 class class class wbr 5096 ℝcr 11023 < clt 11164 ≤ cle 11165 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-br 5097 df-opab 5159 df-xp 5628 df-cnv 5630 df-xr 11168 df-le 11170 |
| This theorem is referenced by: letrii 11256 nn0ge2m1nn 12469 0nelfz1 13457 fzpreddisj 13487 hashnn0n0nn 14312 hashge2el2dif 14401 hash3tpde 14414 divalglem5 16322 divalglem6 16323 sadcadd 16383 htpycc 24933 pco1 24969 pcohtpylem 24973 pcopt 24976 pcopt2 24977 pcoass 24978 pcorevlem 24980 vitalilem5 25567 vieta1lem2 26273 ppiltx 27141 ppiublem1 27167 chtub 27177 axlowdimlem16 28979 axlowdim 28983 lfgrnloop 29147 lfuhgr1v0e 29276 lfgrwlkprop 29708 ballotlem2 34595 subfacp1lem1 35322 subfacp1lem5 35327 bcneg1 35879 poimirlem9 37769 poimirlem16 37776 poimirlem17 37777 poimirlem19 37779 poimirlem20 37780 poimirlem22 37782 fdc 37885 pellexlem6 43018 jm2.23 43180 |
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