Results 211 to 220 of about 625 (264)
Journal of Consumer Behaviour, EarlyView.ABSTRACT This research investigates how consumers establish trust in ghost kitchens, a rapidly growing digital service format that eliminates physical interaction and redefines the boundaries of food consumption. Despite their growing popularity, ghost kitchens present a paradox of trust, as the absence of physical premises and direct interaction ...
Trang Huong Pham +4 more
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Serendipity discrete complexes with enhanced regularity. [PDF]
CalcoloDi Pietro DA, Hanot M, Salah M, Salah M.
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Characterization of matrices with bounded Graver bases and depth parameters and applications to integer programming. [PDF]
Math ProgramBriański M +4 more
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Support-Graph Preconditioners [PDF]
SIAM Journal on Matrix Analysis and Applications, 2006 The authors extend the ``support-graph preconditioning'' technique, introduced by \textit{Y. Notay} [Lect. Notes Math. 1457, 105--125 (1990; Zbl 0722.65012); Linear Algebra 154--156, 711--722 (1991; Zbl 0735.65028); Appl. Numer. Math. 10, No. 5, 381--396 (1992; Zbl 0756.65049)], \textit{R. Beauwens} [Linear Algebra Appl.
Sivan Toledo +2 more
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On Inexact Preconditioners for Nonsymmetric Matrices
SIAM Journal of Scientific Computing, 2005Summary: Inexact versions of the block-triangular preconditioners for nonsymmetric matrices of block two-by-two structures presented by \textit{M. F. Murphy, G. H. Golub}, and \textit{A. J. Wathen}[SIAM J. Sci. Comput. 21, No.~6, 1969--1972 (2000; Zbl 0959.65063)] and by \textit{I. C. F. Ipsen} [ibid.
Michael Ng, Zhong-Zhi Bai
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SIAM Journal on Scientific Computing, 1997
In analogy with the multigrid method, the authors present a solution method for problems based on the \(p\)-version of the finite element method whereby degrees of freedom associated with approximation order \(p\) are visited at once and separately from those of approximation order \(p-1\) and \(p+1\).
Ning Hu, Xian-Zhong Guo, I. Norman Katz
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In analogy with the multigrid method, the authors present a solution method for problems based on the \(p\)-version of the finite element method whereby degrees of freedom associated with approximation order \(p\) are visited at once and separately from those of approximation order \(p-1\) and \(p+1\).
Ning Hu, Xian-Zhong Guo, I. Norman Katz
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Optimal Equivalent Preconditioners
SIAM Journal on Numerical Analysis, 1993Preconditioning strategies for elliptic partial differential operators and their discrete counterparts are compared by a model problem. The technique uses a selfadjoint positive definite operator \(B\) as the preconditioner for the nonselfadjoint convection-diffusion operator \(A\). Preconditioning is done by \(A\)'s leading term plus a positive zeroth
Manteuffel, Thomas, Otto, James
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Applied Numerical Mathematics, 1998
This is the second part of a paper concerned with the use of successive overrelaxation (SOR) as a preconditioner for the nonsymmetric iterative solver GMRES [for the first part see ibid. 18, 431-440 (1995; Zbl 0840.65018)]. The focus of the second part is on parallel implementation issues.
DeLong, M. A., Ortega, J. M.
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This is the second part of a paper concerned with the use of successive overrelaxation (SOR) as a preconditioner for the nonsymmetric iterative solver GMRES [for the first part see ibid. 18, 431-440 (1995; Zbl 0840.65018)]. The focus of the second part is on parallel implementation issues.
DeLong, M. A., Ortega, J. M.
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A Multilevel AINV Preconditioner
Numerical Algorithms, 2002An algebraic multilevel approximate inverse preconditioner, which uses the same design as the algebraic multigrid algorithm, is proposed for solving efficiently symmetric positive definite sparse linear systems in conjunction with preconditioned conjugate gradient method.
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