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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 11325 | . 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 2143 class class class wbr 5109 ℝcr 11094 < clt 11238 ≤ cle 11239 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-br 5110 df-opab 5174 df-xp 5667 df-cnv 5669 df-xr 11242 df-le 11244 |
| This theorem is referenced by: letrii 11330 nn0ge2m1nn 12569 0nelfz1 13566 fzpreddisj 13597 hashnn0n0nn 14423 hashge2el2dif 14513 hash3tpde 14526 divalglem5 16450 divalglem6 16451 sadcadd 16511 htpycc 25139 pco1 25174 pcohtpylem 25178 pcopt 25181 pcopt2 25182 pcoass 25183 pcorevlem 25185 vitalilem5 25771 vieta1lem2 26472 ppiltx 27341 ppiublem1 27366 chtub 27376 axlowdimlem16 29307 axlowdim 29311 lfgrnloop 29475 lfuhgr1v0e 29604 lfgrwlkprop 30035 ballotlem2 34879 subfacp1lem1 35671 subfacp1lem5 35676 bcneg1 36228 poimirlem9 38300 poimirlem16 38307 poimirlem17 38308 poimirlem19 38310 poimirlem20 38311 poimirlem22 38313 fdc 38416 pellexlem6 43581 jm2.23 43743 nprmdvdsfacm1lem2 48393 |
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