Kejia Pan was supported by the National Natural Science Foundation of China(Nos.41474103 and 41204082);the National High Technology Research and Development Program of China(No.2014AA06A602);the Natural Science Foundation of Hunan Province of China(No.2015JJ3148);Dongdong He was supported by the Fundamental Research Funds for the Central Universities,the National Natural Science Foundation of China(No.11402174);the Program for Young Excellent Talents at Tongji University(No.2013KJ012);the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry。
This paper proposes an extrapolation cascadic multigrid(EXCMG)method to solve elliptic problems in domains with reentrant corners.On a class ofλ-graded meshes,we derive some new extrapolation formulas to construct a ...