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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 11440 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
| 4 | 3 | con2bii 360 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ↔ wb 209 ∈ wcel 2146 class class class wbr 5105 ℝcr 11209 < clt 11353 ≤ cle 11354 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-sep 5251 ax-pr 5394 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3416 df-v 3455 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-sn 4588 df-pr 4590 df-op 4838 df-br 5106 df-opab 5170 df-xp 5660 df-cnv 5662 df-xr 11357 df-le 11359 |
| This theorem is used by: letrii 11445 nn0ge2m1nn 12686 0nelfz1 13686 fzpreddisj 13717 hashnn0n0nn 14545 hashge2el2dif 14635 hash3tpde 14648 divalglem5 16579 divalglem6 16580 sadcadd 16640 htpycc 25313 pco1 25348 pcohtpylem 25352 pcopt 25355 pcopt2 25356 pcoass 25357 pcorevlem 25359 vitalilem5 25945 vieta1lem2 26646 ppiltx 27516 ppiublem1 27541 chtub 27551 axlowdimlem16 29547 axlowdim 29551 lfgrnloop 29715 lfuhgr1v0e 29847 lfgrwlkprop 30282 ballotlem2 35174 subfacp1lem1 36065 subfacp1lem5 36070 bcneg1 36628 poimirlem9 38687 poimirlem16 38694 poimirlem17 38695 poimirlem19 38697 poimirlem20 38698 poimirlem22 38700 fdc 38819 pellexlem6 43981 jm2.23 44143 nprmdvdsfacm1lem2 48845 |
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