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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 11294 | . 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 2109 class class class wbr 5107 ℝcr 11067 < clt 11208 ≤ cle 11209 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pr 5387 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-ss 3931 df-nul 4297 df-if 4489 df-sn 4590 df-pr 4592 df-op 4596 df-br 5108 df-opab 5170 df-xp 5644 df-cnv 5646 df-xr 11212 df-le 11214 |
| This theorem is referenced by: letrii 11299 nn0ge2m1nn 12512 0nelfz1 13504 fzpreddisj 13534 hashnn0n0nn 14356 hashge2el2dif 14445 hash3tpde 14458 divalglem5 16367 divalglem6 16368 sadcadd 16428 htpycc 24879 pco1 24915 pcohtpylem 24919 pcopt 24922 pcopt2 24923 pcoass 24924 pcorevlem 24926 vitalilem5 25513 vieta1lem2 26219 ppiltx 27087 ppiublem1 27113 chtub 27123 axlowdimlem16 28884 axlowdim 28888 lfgrnloop 29052 lfuhgr1v0e 29181 lfgrwlkprop 29615 ballotlem2 34480 subfacp1lem1 35166 subfacp1lem5 35171 bcneg1 35723 poimirlem9 37623 poimirlem16 37630 poimirlem17 37631 poimirlem19 37633 poimirlem20 37634 poimirlem22 37636 fdc 37739 pellexlem6 42822 jm2.23 42985 |
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