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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 11303 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 359 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ↔ wb 208 ∈ wcel 2142 class class class wbr 5100 ℝcr 11072 < clt 11216 ≤ cle 11217 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5246 ax-pr 5390 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-xp 5653 df-cnv 5655 df-xr 11220 df-le 11222 |
| This theorem is referenced by: letrii 11308 nn0ge2m1nn 12551 0nelfz1 13548 fzpreddisj 13578 hashnn0n0nn 14404 hashge2el2dif 14493 hash3tpde 14506 divalglem5 16431 divalglem6 16432 sadcadd 16492 htpycc 25042 pco1 25077 pcohtpylem 25081 pcopt 25084 pcopt2 25085 pcoass 25086 pcorevlem 25088 vitalilem5 25674 vieta1lem2 26375 ppiltx 27241 ppiublem1 27266 chtub 27276 axlowdimlem16 29158 axlowdim 29162 lfgrnloop 29326 lfuhgr1v0e 29455 lfgrwlkprop 29886 ballotlem2 34786 subfacp1lem1 35529 subfacp1lem5 35534 bcneg1 36086 poimirlem9 38128 poimirlem16 38135 poimirlem17 38136 poimirlem19 38138 poimirlem20 38139 poimirlem22 38141 fdc 38244 pellexlem6 43411 jm2.23 43573 nprmdvdsfacm1lem2 48230 |
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