Results 31 to 40 of about 5,090,070 (358)
Pre-saddle neutron multiplicity for fission reactions induced by heavy ions and light particles [PDF]
Phys. Rev. C 87, 034610 (2013), 2013 Pre-saddle neutron multiplicity has been calculated for several fission reactions induced by heavy ions and light particles. Experimentally, it is impossible to determine the contribution of neutrons being emitted before the saddle point and those emitted between the saddle and the scission points.
arxiv +1 more source
Numerical solution of saddle point problems
Acta Numerica, 2005 Large linear systems of saddle point type arise in a wide variety of applications throughout computational science and engineering. Due to their indefiniteness and often poor spectral properties, such linear systems represent a significant challenge for ...
M. Benzi, G. Golub, J. Liesen
semanticscholar +1 more source
Numerical Resolution of Fluid Dynamic Problems Using a Saddle Point Variational Formulation
Chemical Engineering Transactions, 2019 Variational methods are useful for finding numerical solutions of differential equations, which are the corresponding Euler-Lagrange equations to the stationary condition of the functional. Usually the functional is a maximum or a minimum with respect to
Reginaldo Guirardello
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On semidifferentiable interval-valued programming problems
Journal of Inequalities and Applications, 2021 In this paper, we consider the semidifferentiable case of an interval-valued minimization problem and establish sufficient optimality conditions and Wolfe type as well as Mond–Weir type duality theorems under semilocal E-preinvex functions.
Kin Keung Lai +2 more
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Three effective preconditioners for double saddle point problem
AIMS Mathematics, 2021 In this paper, we mainly propose three preconditioners for solving double saddle point problems, which arise from some practical problems. Firstly, the solvability of this kind of problem is investigated under suitable assumption. Next, we prove that all
Yuwen He, Jun Li, Lingsheng Meng
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Mathematical analysis for classical Chua's circuit with two nonlinear resistors [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2020 We formulate a mathematical model for the classical Chua’s circuit with two nonlinear resistors in terms of a system of nonlinear ordinary differential equations.
Natchaphon Limphodaen +1 more
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On generation of a limit cycle from a separatrix loop of a sewn saddle-node [PDF]
Известия Саратовского университета. Новая серия. Серия Математика. Механика. Информатика, 2022 The article considers dynamical systems on the plane, defined by continuous piecewise smooth vector fields. Such systems are used as mathematical models of real processes with switching.
Roitenberg, Vladimir Shleymovich
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A parameterized shift-splitting preconditioner for saddle point problems
Mathematical Biosciences and Engineering, 2019 Recently, Chen and Ma [A generalized shift-splitting preconditioner for saddle point problems, Applied Mathematics Letters, 43 (2015) 49-55] introduced a generalized shift-splitting preconditioner for saddle point problems with symmetric positive ...
Li-Tao Zhang , Chao-Qian Li, Yao-Tang Li
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Mathematical Modelling and Analysis, 2022 A new variational approach for a boundary value problem in mathematical physics is proposed. By considering two-field Lagrange multipliers, we deliver a variational formulation consisting of a mixed variational problem which is equivalent with a saddle ...
Mariana Chivu Cojocaru, Andaluzia Matei
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On Uzawa-SSI method for non-Hermitian saddle point problems
AIMS Mathematics, 2020 Based on the single-step iteration (SSI) method for the non-Hermitian positive definite linear systems, we propose a Uzawa-SSI method for solving the saddle point problems with non-Hermitian positive definite (1, 1) block in this paper.
Shu-Xin Miao, Jing Zhang
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