摘要
考虑下面的抛物型积分微分方程初边值问题: (a) ut+A(t)u+∫0tB(t,s)u(s)ds=f, (x,t)∈Q=Ω×J,J=(0,T] (b) u=0,(x,t)∈ Ω×J,(1) (c) u(x,0)=u0,x∈Ω,其中Ω为Rd(d≤4)中具有分片光滑边界 Ω的有界域。
The object of this paper is to study the finite element approximations to in-tegrodifferential problems in Ω Rd(d ≤ 4).Two order global strongly superconvergence in LP(Q) is demonstrated for the error between the approximate solution and the Ritz-Volterra projection of the exact solution. Further,applying interpolated postprocessing to the approximate solution it leads to two order global superconvergence of the error between the exact solution and the interpolation of the approximate solution.
出处
《计算数学》
CSCD
北大核心
2002年第4期385-394,共10页
Mathematica Numerica Sinica
基金
国家和山东自然科学基金资助项目.