Results 21 to 30 of about 56 (53)

A CHARACTERIZATION OF MAPPING UNSTRUCTURED GRIDS ONTO STRUCTURED GRIDS AND USING MULTIGRID AS A PRECONDITIONER

open access: yes, 1997
Many problems based on unstructured grids provide a natural multigrid framework due to using an adaptive gridding procedure. When the grids are saved, even starting from just a ne grid problem poses no serious theoretical di culties in applying multigrid.
Sachit Malhotra   +2 more
core  

HILBERT-SPACE TECHNIQUES FOR SPECTRAL REPRESENTATION IN TERMS OF OVERCOMPLETE BASES

open access: yes, 2007
Topics associated with the representation of objects from a separable Hilbert space in terms of an a priori given overcomplete system (dictionary) of its generators (atoms) are handled. First the procedure of nding such a representation is formulated and
Vtzslav Vesel
core  

ESTIMATING THE CONSUMPTION MATRIX FROM INEXACT DATA IN THE LEONTIEF MODEL

open access: yes, 2008
. The Leontief model, originally developed for describing an economic system in terms of mutually interrelated and structurally conditioned simultaneous flows of commodities and services, has important applications to wide ranging disciplines.
Moody   +4 more
core  

Communication Avoiding Rank Revealing QR Factorization with Column Pivoting

open access: yes, 2013
. In this paper we introduce CARRQR, a communication avoiding rank revealing QR factorization with tournament pivoting. We show that CARRQR reveals the numerical rank of a matrix in an analogous way to QR factorization with column pivoting (QRCP ...
Laura Grigori   +3 more
core  

On Some Properties of Interior Methods for Optimization

open access: yes, 2003
This thesis consists of four independent papers concerningdifferent aspects of interior methods for optimization. Threeof the papers focus on theoretical aspects while the fourth oneconcerns some computational experiments. The systems of equations solved
Sporre, Göran
core  

On Some Properties of Interior Methods for Optimization [Elektronisk resurs]

open access: yes, 2003
This thesis consists of four independent papers concerningdifferent aspects of interior methods for optimization. Threeof the papers focus on theoretical aspects while the fourth oneconcerns some computational experiments.The systems of equations solved ...
Sporre, Göran,
core  

Hotspots for copy number variation in chimpanzees and humans. [PDF]

open access: yesProc Natl Acad Sci U S A, 2006
Perry GH   +11 more
europepmc   +1 more source

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