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《Journal of Baoding University》 2011-03
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The Numerical Experiment of Expansion and Extrapolation of the Eigenvalue Problem on Wilson Element

Zhang Po (Department of Math ematics and Physics,North China Electric Power University,Baoding 071003 ,China)  
The eigenvalue of poisson equation is expanded using wilson noncon -forming element. By the formulation of the error expansion,we can not conclude whether it is a upper bound or a lower bound,but can guess it is a lower bound. By using wilson element to compute the eigenvalue of poisson equation on square domain and then analysising the data,we find that our conjecture is right. we also extraplate the error expansion and enhance the accuracy of the eigenvalue from second order to third order.
【CateGory Index】: O241.6
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