Browse Research and Tech Reports - Computer Science by Author "de Sturler, Eric"

  • Wang, Shun; de Sturler, Eric; Paulino, Glaucio H. (2006-01)
    The computational bottleneck of topology optimization is the solution of a large number of linear systems arising in the finite element analysis. We propose fast iterative solvers for large three-dimensional topology ...

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  • Siefert, Chris M.; de Sturler, Eric (2004-06)
    We examine block-diagonal preconditioners and efficient variants of indefinite preconditioners for block two-by-two generalized saddle-point problems. We consider the general, nonsymmetric, nonsingular case. In particular, ...

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  • Siefert, Chris M.; de Sturler, Eric (2005-03)
    Several Schur complement-based preconditioners have been proposed for solving (generalized) saddle-point problems. We consider probing-based methods for approximating those Schur complements in the preconditioners of the ...

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  • Parks, Michael L.; de Sturler, Eric; Mackey, Greg; Johnson, Duane D.; Maiti, Spandan (2004-03)
    Many problems in engineering and physics require the solution of a large sequence of linear systems. We can reduce the cost of solving subsequent systems in the sequence by recycling information from previous systems. We ...

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  • Kilmer, Misha; de Sturler, Eric (2004-06)
    We discuss the efficient solution of a large sequence of slowly varying linear systems arising in computations for diffuse optical tomographic imaging. In particular, we analyze a number of strategies for recycling Krylov ...

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