广义Fibonacci数列与自然数方幂积的和∑_(κ=1)~nk^mu_κ

本文研究了广义Fibonacci数列的性质 ,得出与∑ nκ =1κmuκ 有关的几个表达式 ,从而肯定的回答了 [3]中PieroFilipponi猜测 :∑nκ =1κmFκ=p(m)1(n)Fn+ 1+p(m)2 (n)Fn+Cm,这里P1(m) (n)和P2 (m) (n)是变量为n 。

有关自然数的平方剩余和因子积的几个渐近公式

本文的主要目的是研究有关因子积序列和平方剩余的渐近性质,得到有关这两个序列的渐近公式。

Natural Boundary Element Method for ParabolicEquations in an Unbounded Domain

In this paper we introduce an implementation for the efficient numericalsolution of exterior initial boundary value problem for parabolic equation. The problemis reformulated as an equivalent one on a boundary T using natural boundary reduction.The governing equation is first discretized in time, leading to a time-stepping scheme,where an exterior elliptic problem has to be solved in each time step. By Fourier ex-pansion, we derive a natural integral equation of the elliptic problem related to timestep and Poisson integral integral formula over exterior circular domain. Finite elementdiscretization of the natural integral equation is employed to solve this problem. Thecomputational aspects of this method are discussed. Numerical results are presented toillustrate feasibility and efficiency of our method.