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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 11289 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 359 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 208 ∈ wcel 2132 class class class wbr 5090 ℝcr 11058 < clt 11202 ≤ cle 11203 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-ext 2724 ax-sep 5236 ax-pr 5380 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-sb 2081 df-clab 2731 df-cleq 2744 df-clel 2827 df-ral 3067 df-rex 3077 df-rab 3405 df-v 3446 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-nul 4277 df-if 4471 df-sn 4573 df-pr 4575 df-op 4579 df-br 5091 df-opab 5153 df-xp 5642 df-cnv 5644 df-xr 11206 df-le 11208 |
| This theorem is referenced by: letrii 11294 nn0ge2m1nn 12537 0nelfz1 13534 fzpreddisj 13564 hashnn0n0nn 14390 hashge2el2dif 14479 hash3tpde 14492 divalglem5 16403 divalglem6 16404 sadcadd 16464 htpycc 25011 pco1 25046 pcohtpylem 25050 pcopt 25053 pcopt2 25054 pcoass 25055 pcorevlem 25057 vitalilem5 25643 vieta1lem2 26341 ppiltx 27207 ppiublem1 27232 chtub 27242 axlowdimlem16 29093 axlowdim 29097 lfgrnloop 29261 lfuhgr1v0e 29390 lfgrwlkprop 29821 ballotlem2 34730 subfacp1lem1 35467 subfacp1lem5 35472 bcneg1 36024 poimirlem9 38066 poimirlem16 38073 poimirlem17 38074 poimirlem19 38076 poimirlem20 38077 poimirlem22 38079 fdc 38182 pellexlem6 43349 jm2.23 43511 nprmdvdsfacm1lem2 48168 |
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