Abstract
A two-grid partition of unity method for second order elliptic problems is proposed and analyzed. The standard two-grid method is a local and parallel method usually leading to a discontinuous solution in the entire computational domain. Partition of unity method is employed to glue all the local solutions together to get the global continuous one, which is optimal in H 1-norm. Furthermore, it is shown that the L 2 error can be improved by using the coarse grid correction. Numerical experiments are reported to support the theoretical results.
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Communicated by YE Zhi-ming
Project supported by the National Natural Science Foundation of China (No. 40074031), the Science Foundation of the Science and Technology Commission of Shanghai Municipality, and the Program for Young Excellent Talents in Tongji University (No. 2007kj008)
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Wang, C., Huang, Zp. & Li, Lk. Two-grid partition of unity method for second order elliptic problems. Appl. Math. Mech.-Engl. Ed. 29, 527–533 (2008). https://doi.org/10.1007/s10483-008-0411-x
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DOI: https://doi.org/10.1007/s10483-008-0411-x