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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 11257 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 358 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 207 ∈ wcel 2119 class class class wbr 5072 ℝcr 11028 < clt 11170 ≤ cle 11171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-br 5073 df-opab 5135 df-xp 5624 df-cnv 5626 df-xr 11174 df-le 11176 |
| This theorem is referenced by: letrii 11262 nn0ge2m1nn 12498 0nelfz1 13488 fzpreddisj 13518 hashnn0n0nn 14344 hashge2el2dif 14433 hash3tpde 14446 divalglem5 16357 divalglem6 16358 sadcadd 16418 htpycc 24965 pco1 25000 pcohtpylem 25004 pcopt 25007 pcopt2 25008 pcoass 25009 pcorevlem 25011 vitalilem5 25597 vieta1lem2 26295 ppiltx 27158 ppiublem1 27183 chtub 27193 axlowdimlem16 29044 axlowdim 29048 lfgrnloop 29212 lfuhgr1v0e 29341 lfgrwlkprop 29772 ballotlem2 34673 subfacp1lem1 35407 subfacp1lem5 35412 bcneg1 35964 poimirlem9 37996 poimirlem16 38003 poimirlem17 38004 poimirlem19 38006 poimirlem20 38007 poimirlem22 38009 fdc 38112 pellexlem6 43279 jm2.23 43441 nprmdvdsfacm1lem2 48099 |
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