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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 11260 | . 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 5086 ℝcr 11031 < clt 11173 ≤ cle 11174 |
| 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 5232 ax-pr 5371 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-xp 5631 df-cnv 5633 df-xr 11177 df-le 11179 |
| This theorem is referenced by: letrii 11265 nn0ge2m1nn 12501 0nelfz1 13491 fzpreddisj 13521 hashnn0n0nn 14347 hashge2el2dif 14436 hash3tpde 14449 divalglem5 16360 divalglem6 16361 sadcadd 16421 htpycc 24960 pco1 24995 pcohtpylem 24999 pcopt 25002 pcopt2 25003 pcoass 25004 pcorevlem 25006 vitalilem5 25592 vieta1lem2 26291 ppiltx 27157 ppiublem1 27182 chtub 27192 axlowdimlem16 29043 axlowdim 29047 lfgrnloop 29211 lfuhgr1v0e 29340 lfgrwlkprop 29772 ballotlem2 34652 subfacp1lem1 35380 subfacp1lem5 35385 bcneg1 35937 poimirlem9 37967 poimirlem16 37974 poimirlem17 37975 poimirlem19 37977 poimirlem20 37978 poimirlem22 37980 fdc 38083 pellexlem6 43283 jm2.23 43445 nprmdvdsfacm1lem2 48099 |
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