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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 11330 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 360 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 209 ∈ wcel 2149 class class class wbr 5113 ℝcr 11099 < clt 11243 ≤ cle 11244 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5114 df-opab 5178 df-xp 5668 df-cnv 5670 df-xr 11247 df-le 11249 |
| This theorem is referenced by: letrii 11335 nn0ge2m1nn 12574 0nelfz1 13571 fzpreddisj 13601 hashnn0n0nn 14427 hashge2el2dif 14517 hash3tpde 14530 divalglem5 16455 divalglem6 16456 sadcadd 16516 htpycc 25108 pco1 25143 pcohtpylem 25147 pcopt 25150 pcopt2 25151 pcoass 25152 pcorevlem 25154 vitalilem5 25740 vieta1lem2 26441 ppiltx 27307 ppiublem1 27332 chtub 27342 axlowdimlem16 29248 axlowdim 29252 lfgrnloop 29416 lfuhgr1v0e 29545 lfgrwlkprop 29976 ballotlem2 34824 subfacp1lem1 35570 subfacp1lem5 35575 bcneg1 36127 poimirlem9 38168 poimirlem16 38175 poimirlem17 38176 poimirlem19 38178 poimirlem20 38179 poimirlem22 38181 fdc 38284 pellexlem6 43453 jm2.23 43615 nprmdvdsfacm1lem2 48262 |
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