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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 10917 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
4 | 3 | con2bii 361 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 209 ∈ wcel 2112 class class class wbr 5039 ℝcr 10693 < clt 10832 ≤ cle 10833 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-br 5040 df-opab 5102 df-xp 5542 df-cnv 5544 df-xr 10836 df-le 10838 |
This theorem is referenced by: letrii 10922 nn0ge2m1nn 12124 0nelfz1 13096 fzpreddisj 13126 hashnn0n0nn 13923 hashge2el2dif 14011 divalglem5 15921 divalglem6 15922 sadcadd 15980 htpycc 23831 pco1 23866 pcohtpylem 23870 pcopt 23873 pcopt2 23874 pcoass 23875 pcorevlem 23877 vitalilem5 24463 vieta1lem2 25158 ppiltx 26013 ppiublem1 26037 chtub 26047 axlowdimlem16 27002 axlowdim 27006 lfgrnloop 27170 lfuhgr1v0e 27296 lfgrwlkprop 27729 ballotlem2 32121 subfacp1lem1 32808 subfacp1lem5 32813 bcneg1 33371 poimirlem9 35472 poimirlem16 35479 poimirlem17 35480 poimirlem19 35482 poimirlem20 35483 poimirlem22 35485 fdc 35589 pellexlem6 40300 jm2.23 40462 |
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