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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 11253 | . 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 5098 ℝcr 11025 < clt 11166 ≤ cle 11167 |
| 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 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-xp 5630 df-cnv 5632 df-xr 11170 df-le 11172 |
| This theorem is referenced by: letrii 11258 nn0ge2m1nn 12471 0nelfz1 13459 fzpreddisj 13489 hashnn0n0nn 14314 hashge2el2dif 14403 hash3tpde 14416 divalglem5 16324 divalglem6 16325 sadcadd 16385 htpycc 24935 pco1 24971 pcohtpylem 24975 pcopt 24978 pcopt2 24979 pcoass 24980 pcorevlem 24982 vitalilem5 25569 vieta1lem2 26275 ppiltx 27143 ppiublem1 27169 chtub 27179 axlowdimlem16 29030 axlowdim 29034 lfgrnloop 29198 lfuhgr1v0e 29327 lfgrwlkprop 29759 ballotlem2 34646 subfacp1lem1 35373 subfacp1lem5 35378 bcneg1 35930 poimirlem9 37830 poimirlem16 37837 poimirlem17 37838 poimirlem19 37840 poimirlem20 37841 poimirlem22 37843 fdc 37946 pellexlem6 43086 jm2.23 43248 |
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