epidermis
发表于 2025-3-23 13:13:53
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bile648
发表于 2025-3-23 17:31:48
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jaunty
发表于 2025-3-23 18:56:54
Inversion of Block-Tridiagonal Matrices and Nonnegativity Preservation in the Numerical Solution of in the componentwise sense. We solve the above problem by suitably chosen numerical method. Since . denotes the concentration, which is always nonnegative, it is natural to require the nonnegativity from the numerical approximations of . as well.
沙发
发表于 2025-3-23 23:28:33
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Infirm
发表于 2025-3-24 02:34:48
Geometric Interpretations of Conjugate Gradient and Related Methods.,...{b}.). ∈ ℝ. is a given right-hand side. This method can be considered as direct as well as iterative. It is similar to the Lanczos method for finding eigenvalues presented in [.] (which is mentioned in ).
灯泡
发表于 2025-3-24 06:55:18
The Convergence of Krylov Methods and Ritz Valuesction with the Lanczos method for approximation of eigenvalues of .. A disadvantage is that the actual . for both the conjugate gradients and the Lanczos method do not follow too easily and require clever combination of several ingredients.
柔声地说
发表于 2025-3-24 11:59:24
On the Nonnegativity Conservation in Semidiscrete Parabolic Problemsd comparison principles are fundamental properties of partial differential equations of second order. There are different formulations of these principles. They hold for a variety of linear and nonlinear problems, see e.g., [.], [.], [.], [.], [.], [.], [.], [.].
Melodrama
发表于 2025-3-24 17:24:58
Subcritical Solitons I: Saturable Absorber,nd suggest error indicators/estimators that are further used in various mesh adaptive procedures (see, e.g., [.]). Global error estimates give a general presentation on the quality of an approximate solution and a stopping criteria.
Lobotomy
发表于 2025-3-24 20:51:52
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公理
发表于 2025-3-25 02:22:14
Michal Křížek,Pekka Neittaanmäki,Roland GlowinskiIncludes supplementary material: