نتایج جستجو برای: k epsilon

تعداد نتایج: 387854  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Martin Kassabov Alexander Lubotzky Nikolay Nikolov

We prove that there exist k in and 0 < epsilon in such that every non-abelian finite simple group G, which is not a Suzuki group, has a set of k generators for which the Cayley graph Cay(G; S) is an epsilon-expander.

2018
Carl Feghali

The reconfiguration graph $R_k(G)$ of the $k$-colourings of a graph~$G$ has as vertex set the set of all possible $k$-colourings of $G$ and two colourings are adjacent if they differ on exactly one vertex. We give a short proof of the following theorem of Bousquet and Perarnau (\emph{European Journal of Combinatorics}, 2016). Let $d$ and $k$ be positive integers, $k \geq d + 1$. For every $\eps...

Journal: :International Mathematics Research Notices 2022

Abstract We prove that there exists a constant $\epsilon&amp;gt; 0$ with the following property: if $K \subset {\mathbb {R}}^2$ is compact set contains no pair of form $\{x, x + (z, z^{2})\}$ for $z \neq 0$, then $\dim _{\textrm {H}} K \leq 2 - \epsilon $.

The aim of this paper is to introduce the notions of ($epsilon, epsilon vee q$)-fuzzy p-ideals, ($epsilon, epsilon vee q$)-fuzzy q-ideals and ($epsilon, epsilon vee q$)-fuzzy a-ideals in BCIalgebras and to investigate some of their properties. Several characterizationtheorems for these generalized fuzzy ideals are proved and the relationshipamong these generalized fuzzy ideals of BCI-algebras i...

Journal: :Monatshefte für Mathematik 2023

In the present paper, we prove that generalized Riemann hypothesis for Dirichlet L-function $$L(s,\chi )$$ is equivalent to following bound: Let $$k \ge 1$$ and $$\ell $$ be positive real numbers. For any $$\epsilon >0$$ , have $$\begin{aligned} \sum _{n=1}^{\infty } \frac{\chi (n) \mu (n)}{n^{k}} \exp \left( - \frac{ x}{n^{\ell }}\right) = O_{\epsilon ,k,\ell \bigg (x^{-\frac{k}{\ell }+\frac{1...

ژورنال: :سد و نیروگاه برق آبی 0
سید حسین مهاجری seyed hossein mohajeri italyایتالیا اکبر صفرزاده akbar safarzadeh ardabilاردبیل

در مطالعه حاضر یک مدل عددی جهت کنترل بازدهی رسوب­ شویی در مخزن سدها ارائه می­شود که در آن میدان جریان و بار معلق جامد شبیه­ سازی گردیده­اند. این مدل، یک مدل سه بعدی است که در آن معادلات حرکت (معادلات متوسط­ گیری شده ناویر-استوکس) همراه با معادله انتقال رسوب حل می­گردند. در این مدل، از روش  استاندارد برای مدل­ سازی آشفتگی استفاده شده است. مزیت اصلی مدل عددی حاضر استفاده از روش ریز شدن مش یا به ا...

Journal: :Physical review letters 2005
G Beer A M Bragadireanu M Cargnelli C Curceanu-Petrascu J-P Egger H Fuhrmann C Guaraldo M Iliescu T Ishiwatari K Itahashi M Iwasaki P Kienle T Koike B Lauss V Lucherini L Ludhova J Marton F Mulhauser T Ponta L A Schaller R Seki D L Sirghi F Sirghi J Zmeskal

The DEAR (DAPhiNE exotic atom research) experiment measured the energy of x rays emitted in the transitions to the ground state of kaonic hydrogen. The measured values for the shift epsilon and the width Gamma of the 1s state due to the K(-)p strong interaction are epsilon(1s)=-193 +/- 37 (stat) +/- 6 (syst) eV and Gamma(1s)=249 +/- 111 (stat) +/- 30 (syst) eV, the most precise values yet obtai...

Journal: :Proceedings 2021

Let $K$ be a subgroup of finite group $G$ . The probability that an element commutes with is denoted by $Pr(K,G)$ Assume $Pr(K,G)\geq \epsilon$ for some fixed $\epsilon &gt;0$ We show there normal $T\leq G$ and $B\leq K$ such the indices $[G:T]$ $[K:B]$ order commutator $[T,B]$ are $\epsilon$ -bounded. This extends well-known theorem, due to P. M. Neumann, covers case where $K=G$ deduce number ...

Journal: :Transactions of the American Mathematical Society 2021

In this article we study the asymptotic behavior of small eigenvalues Riemann surfaces for large genus. We show that any positive integer $k$, as genus $g$ goes to infinity, smallest $k$-th eigenvalue in thick part moduli space is uniformly comparable $\frac{1}{g^2}$ $g$. proof upper bound, constant $\epsilon>0$, will construct a closed surface $\epsilon$-thick such it admits pants decompositio...

2014
Shi Li

In the capacitated k-median (CKM) problem, we are given a set F of facilities, each with a capacity, a set C of clients, a metric d over F ∪ C and an integer k. The goal is to open k facilities in F and connect the clients C to the open facilities subject to the capacity constraints, so as to minimize the total connection cost. In this paper, we give a constant approximation for CKM, by violati...

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