Speaker：Xuejun Xu（Tongji University）

Time：2022-10-20, 16:30

Location：Tencent Meeting ID：363752078（No Password）

Abstract:

In this talk, we shall present a two-level block preconditioned Jacobi-Davidson (BPJD) method for solving discrete eigenvalue problems resulting from finite element approximations of 2mth (m = 1, 2) order elliptic eigenvalue problems. A new and efficient preconditioner is constructed by an overlapping domain decomposition (DD). This method may compute the first several eigenpairs, including simple, multiple and clustered cases. In each iteration, we only need to solve a couple of parallel subproblems and one small scale eigenvalue problem. This is a joint work with Qigang Liang and Wei Wang.