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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 10760 | . 2 ⊢ (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵) |
4 | 3 | con2bii 360 | 1 ⊢ (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 208 ∈ wcel 2114 class class class wbr 5066 ℝcr 10536 < clt 10675 ≤ cle 10676 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-opab 5129 df-xp 5561 df-cnv 5563 df-xr 10679 df-le 10681 |
This theorem is referenced by: letrii 10765 nn0ge2m1nn 11965 0nelfz1 12927 fzpreddisj 12957 hashnn0n0nn 13753 hashge2el2dif 13839 n2dvds1OLD 15718 divalglem5 15748 divalglem6 15749 sadcadd 15807 htpycc 23584 pco1 23619 pcohtpylem 23623 pcopt 23626 pcopt2 23627 pcoass 23628 pcorevlem 23630 vitalilem5 24213 vieta1lem2 24900 ppiltx 25754 ppiublem1 25778 chtub 25788 axlowdimlem16 26743 axlowdim 26747 lfgrnloop 26910 lfuhgr1v0e 27036 lfgrwlkprop 27469 ballotlem2 31746 subfacp1lem1 32426 subfacp1lem5 32431 bcneg1 32968 poimirlem9 34916 poimirlem16 34923 poimirlem17 34924 poimirlem19 34926 poimirlem20 34927 poimirlem22 34929 fdc 35035 pellexlem6 39451 jm2.23 39613 |
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