# American Institute of Mathematical Sciences

2014, 4(3): 227-239. doi: 10.3934/naco.2014.4.227

## Sparse inverse incidence matrices for Schilders' factorization applied to resistor network modeling

 1 Center for Analysis, Scientific Computing and Applications, Department of Mathematics and Computer Science, Eindhoven University of Technology, 5600 MB, Eindhoven, Netherlands, Netherlands, Netherlands

Received  December 2013 Revised  August 2014 Published  September 2014

Schilders' factorization can be used as a basis for preconditioning indefinite linear systems which arise in many problems like least-squares, saddle-point and electronic circuit simulations. Here we consider its application to resistor network modeling. In that case the sparsity of the matrix blocks in Schilders' factorization depends on the sparsity of the inverse of a permuted incidence matrix. We introduce three different possible permutations and determine which permutation leads to the sparsest inverse of the incidence matrix. Permutation techniques are based on types of sub-digraphs of the network of an incidence matrix.
Citation: Sangye Lungten, Wil H. A. Schilders, Joseph M. L. Maubach. Sparse inverse incidence matrices for Schilders' factorization applied to resistor network modeling. Numerical Algebra, Control & Optimization, 2014, 4 (3) : 227-239. doi: 10.3934/naco.2014.4.227
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##### References:
 [1] R. Balakrishnan and K. Ranganathan, A Textbook of Graph Theory,, 2nd edition, (2012).  doi: 10.1007/978-1-4614-4529-6.  Google Scholar [2] R. B. Bapat, Graphs and Matrices,, Hindustan Book Agency, (2010).  doi: 10.1007/978-1-84882-981-7.  Google Scholar [3] G. Chartrand and L. Lesniak, Graphs and Digraphs,, 3rd edition, (1996).   Google Scholar [4] Z. Lijang, A matrix solution to Hamiltonian path of any graph,, International conference on intelligent computing and cognitive informatics, (2010).   Google Scholar [5] J. Rommes and W. H. A. Schilders, Efficient methods for large resistor networks,, IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 29 (2010), 28.   Google Scholar [6] Y. Saad, Preconditioning techniques for nonsymetric and indefinite linear systems,, Journal of Computational and Applied Mathematics, 24 (1988), 89.  doi: 10.1016/0377-0427(88)90345-7.  Google Scholar [7] W. H. A. Schilders, Solution of indefinite linear systems using an LQ decomosition for the linear constraints,, Linear Algebra and Applications, 431 (2009), 381.  doi: 10.1016/j.laa.2009.02.036.  Google Scholar [8] R. Vandebril, M. V. Barel and N. Mastronardi, Matrix Computations and Semiseparable Matrices,, The Johns Hopkins University Press, ().   Google Scholar
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