Nonnegativity

Let π be a cuspidal generic representation of SO(2n + 1, A). We prove that L( 1 , π) ≥ 0. 2 1. Introduction Let π be a cuspidal automorphic representation of GLn (A) where A is the ring of ad`les of a number field F . Suppose that π is self-dual. Then the e “standard” L-function ([GJ72]) L(s, π) is real for s ∈ R and positive for s

28p tuanloccuoi 04-01-2013 52 6   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Determining Patterns in Neural Activity for Reaching Movements Using Nonnegative Matrix Factorization

9p dauphong20 11-03-2012 45 3   Download

EIGENVALUE PROBLEMS FOR DEGENERATE NONLINEAR ELLIPTIC EQUATIONS IN ANISOTROPIC MEDIA ˘ DUMITRU MOTREANU AND VICENTIU RADULESCU ¸ Received 23 September 2004 and in revised form 26 November 2004 We study nonlinear eigenvalue problems of the type − div(a(x)∇u) = g(λ,x,u) in RN , where a(x) is a degenerate nonnegative weight. We establish the existence of solutions and we obtain information on qualitative properties as multiplicity and location of solutions. Our approach is based on the critical point theory in Sobolev weighted spaces combined with a Caffarelli-Kohn-Nirenberg-type inequality.

21p sting12 10-03-2012 46 5   Download

POSITIVE PERIODIC SOLUTIONS OF FUNCTIONAL DISCRETE SYSTEMS AND POPULATION MODELS YOUSSEF N. RAFFOUL AND CHRISTOPHER C. TISDELL Received 29 March 2004 and in revised form 23 August 2004 We apply a cone-theoretic fixed point theorem to study the existence of positive periodic solutions of the nonlinear system of functional difference equations x(n + 1) = A(n)x(n) + f (n,xn ). 1. Introduction Let R denote the real numbers, Z the integers, Z− the negative integers, and Z+ the nonnegative integers.

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RATE OF CONVERGENCE OF SOLUTIONS OF RATIONAL DIFFERENCE EQUATION OF SECOND ORDER ˇ ´ ´ S. KALABUSIC AND M. R. S. KULENOVIC Received 13 August 2003 and in revised form 7 October 2003 We investigate the rate of convergence of solutions of some special cases of the equation xn+1 = (α + βxn + γxn−1 )/(A + Bxn + Cxn−1 ), n = 0,1,..., with positive parameters and nonnegative initial conditions. We give precise results about the rate of convergence of the solutions that converge to the equilibrium or period-two solution by using Poincar´ ’s e theorem and an improvement of Perron’s...

19p sting12 10-03-2012 55 4   Download

ON THE GROWTH RATE OF GENERALIZED FIBONACCI NUMBERS DONNIELL E. FISHKIND Received 1 May 2004 Let α(t) be the limiting ratio of the generalized Fibonacci numbers produced by summing along lines of slope t through the natural arrayal of Pascal’s triangle. We prove that √ α(t) 3+t is an even function. 1. Overview Pascal’s triangle may be arranged in the Euclidean plane by associating the binomial coefficient ij with the point 1 3 j − i, − i ∈ R2 2 2 √ (1.1) for all nonnegative integers i, j such that j ≤ i, as illustrated in Figure 1.1. The points in R2 associated...

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STABILITY FOR DELAYED GENERALIZED 2D DISCRETE LOGISTIC SYSTEMS CHUAN JUN TIAN AND GUANRONG CHEN Received 28 August 2003 and in revised form 19 February 2004 This paper is concerned with delayed generalized 2D discrete logistic systems of the form xm+1,n = f (m,n,xm,n ,xm,n+1 ,xm−σ,n−τ ), where σ and τ are positive integers, f : N2 × R3 → 0 R is a real function, which contains the logistic map as a special case, and m and n are nonnegative integers, where N0 = {0,1,...} and R = (−∞, ∞). Some sufficient conditions for this system to be stable and exponentially stable...

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ON MONOTONICITY OF SOLUTIONS OF DISCRETE-TIME NONNEGATIVE AND COMPARTMENTAL DYNAMICAL SYSTEMS VIJAYSEKHAR CHELLABOINA, WASSIM M. HADDAD, JAMES M. BAILEY, AND JAYANTHY RAMAKRISHNAN Received 27 October 2003 Nonnegative and compartmental dynamical system models are widespread in biological, physiological, and pharmacological sciences. Since the state variables of these systems are typically masses or concentrations of a physical process, it is of interest to determine necessary and sufficient conditions under which the system states possess monotonic solutions.

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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Fast Nonnegative Matrix Factorization and Its Application for Protein Fold Recognition

8p dauphong20 10-03-2012 29 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Liouville Theorems for a Class of Linear Second-Order Operators with Nonnegative

16p dauphong18 09-03-2012 47 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: MULTIPLE NONNEGATIVE SOLUTIONS FOR BVPs OF FOURTH-ORDER DIFFERENCE EQUATIONS

7p dauphong18 09-03-2012 42 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: INEQUALITIES INVOLVING THE MEAN AND THE STANDARD DEVIATION OF NONNEGATIVE REAL NUMBERS

15p dauphong18 09-03-2012 43 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Liouville Theorems for a Class of Linear Second-Order Operators with Nonnegative Characteristic Form

16p sting10 07-03-2012 43 3   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Neural Network Adaptive Control for Discrete-Time Nonlinear Nonnegative Dynamical Systems

29p sting10 29-02-2012 44 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Recognition of Nonprototypical Emotions in Reverberated and Noisy Speech by Nonnegative Matrix Factorization

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Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí toán học quốc tế đề tài: Monomial nonnegativity and the Bruhat order...

5p thulanh5 13-09-2011 43 2   Download

We give two new criteria by which pairs of permutations may be compared in defining the Bruhat order (of type A). One criterion utilizes totally nonnegative polynomials and the other utilizes Schur functions.The Bruhat order on Sn is often defined by comparing permutations = (1) · · ·(n) and = (1) · · ·(n) according to the following criterion..

4p thulanh5 12-09-2011 61 3   Download

We gave a new criterion for graphical partitions. We derive a new recursion formula, which allows the computation of the number g(n) of graphical partitions of weight n for up to n 900.A partition of weight n is a nonincreasing sequence of nonnegative integers (1, 2, . . . , k, . . .) whose sum is n. The weight is denoted by ||. The number of nonzero elements in the sequence is the length of the partition denoted by l(). The set of all partitions of weight n is denoted by P(n).

17p thulanh5 12-09-2011 53 4   Download