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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 11265 | . 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 2114 class class class wbr 5100 ℝcr 11037 < clt 11178 ≤ cle 11179 |
| 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 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-xp 5638 df-cnv 5640 df-xr 11182 df-le 11184 |
| This theorem is referenced by: letrii 11270 nn0ge2m1nn 12483 0nelfz1 13471 fzpreddisj 13501 hashnn0n0nn 14326 hashge2el2dif 14415 hash3tpde 14428 divalglem5 16336 divalglem6 16337 sadcadd 16397 htpycc 24947 pco1 24983 pcohtpylem 24987 pcopt 24990 pcopt2 24991 pcoass 24992 pcorevlem 24994 vitalilem5 25581 vieta1lem2 26287 ppiltx 27155 ppiublem1 27181 chtub 27191 axlowdimlem16 29042 axlowdim 29046 lfgrnloop 29210 lfuhgr1v0e 29339 lfgrwlkprop 29771 ballotlem2 34667 subfacp1lem1 35395 subfacp1lem5 35400 bcneg1 35952 poimirlem9 37880 poimirlem16 37887 poimirlem17 37888 poimirlem19 37890 poimirlem20 37891 poimirlem22 37893 fdc 37996 pellexlem6 43191 jm2.23 43353 |
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