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SIAMMAX
2010
224views more  SIAMMAX 2010»
13 years 2 days ago
Robust Approximate Cholesky Factorization of Rank-Structured Symmetric Positive Definite Matrices
Abstract. Given a symmetric positive definite matrix A, we compute a structured approximate Cholesky factorization A RT R up to any desired accuracy, where R is an upper triangula...
Jianlin Xia, Ming Gu
EUROPAR
2011
Springer
12 years 5 months ago
A Bit-Compatible Parallelization for ILU(k) Preconditioning
Abstract. ILU(k) is a commonly used preconditioner for iterative linear solvers for sparse, non-symmetric systems. It is often preferred for the sake of its stability. We present T...
Xin Dong 0004, Gene Cooperman
FGCS
2006
122views more  FGCS 2006»
13 years 5 months ago
Conceptual interfaces in hypre
The hypre software library is being developed with the aim of providing scalable solvers for the solution of large, sparse linear systems on massively parallel computers. To this e...
Robert D. Falgout, Jim E. Jones, Ulrike Meier Yang
ICCV
2009
IEEE
14 years 8 months ago
Radiometric Compensation using Stratified Inverses
Through radiometric compensation, a projector-camera system can project a desired image onto a non-flat and nonwhite surface. This can be achieved by computing the inverse light tr...
Tian-Tsong Ng, Ramanpreet S. Pahwa, Jiamin Bai, To...
TSP
2008
103views more  TSP 2008»
13 years 5 months ago
Low-Rank Variance Approximation in GMRF Models: Single and Multiscale Approaches
Abstract--We present a versatile framework for tractable computation of approximate variances in large-scale Gaussian Markov random field estimation problems. In addition to its ef...
Dmitry M. Malioutov, Jason K. Johnson, Myung Jin C...