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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 10754 | . 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 2110 class class class wbr 5058 ℝcr 10530 < clt 10669 ≤ cle 10670 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 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 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-br 5059 df-opab 5121 df-xp 5555 df-cnv 5557 df-xr 10673 df-le 10675 |
This theorem is referenced by: letrii 10759 nn0ge2m1nn 11958 0nelfz1 12920 fzpreddisj 12950 hashnn0n0nn 13746 hashge2el2dif 13832 n2dvds1OLD 15712 divalglem5 15742 divalglem6 15743 sadcadd 15801 htpycc 23578 pco1 23613 pcohtpylem 23617 pcopt 23620 pcopt2 23621 pcoass 23622 pcorevlem 23624 vitalilem5 24207 vieta1lem2 24894 ppiltx 25748 ppiublem1 25772 chtub 25782 axlowdimlem16 26737 axlowdim 26741 lfgrnloop 26904 lfuhgr1v0e 27030 lfgrwlkprop 27463 ballotlem2 31741 subfacp1lem1 32421 subfacp1lem5 32426 bcneg1 32963 poimirlem9 34895 poimirlem16 34902 poimirlem17 34903 poimirlem19 34905 poimirlem20 34906 poimirlem22 34908 fdc 35014 pellexlem6 39424 jm2.23 39586 |
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