## Substructuring preconditioners for saddle-point problems arising from Maxwell’s equations in three dimensions

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- by Qiya Hu and Jun Zou;
- Math. Comp.
**73**(2004), 35-61 - DOI: https://doi.org/10.1090/S0025-5718-03-01541-2
- Published electronically: August 19, 2003
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## Abstract:

This paper is concerned with the saddle-point problems arising from edge element discretizations of Maxwell’s equations in a general three dimensional nonconvex polyhedral domain. A new augmented technique is first introduced to transform the problems into equivalent augmented saddle-point systems so that they can be solved by some existing preconditioned iterative methods. Then some substructuring preconditioners are proposed, with very simple coarse solvers, for the augmented saddle-point systems. With the preconditioners, the condition numbers of the preconditioned systems are nearly optimal; namely, they grow only as the logarithm of the ratio between the subdomain diameter and the finite element mesh size.## References

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## Bibliographic Information

**Qiya Hu**- Affiliation: Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, China
- Email: hqy@lsec.cc.ac.cn
**Jun Zou**- Affiliation: Department of Mathematics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
- ORCID: 0000-0002-4809-7724
- Email: zou@math.cuhk.edu.hk
- Received by editor(s): February 21, 2002
- Received by editor(s) in revised form: July 15, 2002
- Published electronically: August 19, 2003
- Additional Notes: The work of the first author was supported by Special Funds for Major State Basic Research Projects of China G1999032804.

The work of the second author was partially supported by Hong Kong RGC Grants CUHK4048/02P and CUHK4292/00P - © Copyright 2003 American Mathematical Society
- Journal: Math. Comp.
**73**(2004), 35-61 - MSC (2000): Primary 65N30, 65N55
- DOI: https://doi.org/10.1090/S0025-5718-03-01541-2
- MathSciNet review: 2034110