| Abstract: |
| We will introduce fast solvers for edge element discretizations of time-harmonic Maxwell equations. We first present the classical two grid method, iterative two gird method and improved two-gird method. Secondly, we design and analysis the corresponding additive Schwarz preconditions, the key is to construct a special ``coarse mesh`` space, which adds the kernel of the curl-operator in a fine space to a coarse mesh space, to solve the original problem, and then uses the fine mesh space to solve the H(curl)-elliptic problem. Numerical experiments show the efficiency of the proposed approach. |
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