A generalization of singly-implicit methodsSpringer Science and Business Media LLC - Tập 21 - Trang 175-189 - 1981
J. C. Butcher
Singly-implicit Runge-Kutta methods are characterized by a one-point spectrum property of the coefficient matrix. If a method of this type is also a collocation method, then its abscissae are proportional to the zeros of a Laguerre polynomial. The generalization introduced here is a multistep method in the style of Nordsieck and also a multistage method under the one-point spectrum constraint. It ...... hiện toàn bộ
Convex interval interpolation with cubic splines, IISpringer Science and Business Media LLC - Tập 31 - Trang 328-340 - 1991
Jochen W. Schmidt
The problem of convex interval interpolation with cubicC
1-splines has an infinite number of solutions, if it is solvable at all. For selecting one of the solutions a regularized mean curvature is minimized. The arising finite dimensional constrained program is solved numerically by means of a dualization approach.
Computation of connection coefficients and measure modifications for orthogonal polynomialsSpringer Science and Business Media LLC - Tập 52 - Trang 457-483 - 2011
Akil Narayan, Jan S. Hesthaven
We observe that polynomial measure modifications for families of univariate orthogonal polynomials imply sparse connection coefficient relations. We therefore propose connecting L
2 expansion coefficients between a polynomial family and a modified family by a sparse transformation. Accuracy and conditioning of the connection and its inverse are explored. The connection and recurren...... hiện toàn bộ
Rate of convergence of Local Linearization schemes for random differential equationsSpringer Science and Business Media LLC - Tập 49 - Trang 357-373 - 2009
Juan Carlos Jimenez, Felix Carbonell
Recently, two Local Linearization (LL) schemes for the numerical integration of random differential equation have been proposed, which differ with respect to the algorithm that is used for the numerical implementation of the Local Linear discretization. However, in contrast with the Local Linear discretization, the order of convergence of the LL schemes have not been studied so far. In this paper,...... hiện toàn bộ
Evalquote in simple Fortran: A tutorial on interpreting LispSpringer Science and Business Media LLC - Tập 12 - Trang 299-317 - 1972
Jacques Cohen, Carl Zuckerman
This paper describes the implementation of a pedagogical version of Evalquote with a set of Fortran subroutines. Their study enables the user to understand the programming machinery needed to interpret Lisp programs; the implementation of the subroutines allows him to run pure Lisp in machines for which only Fortran is available. The approach used in this paper is to define a stack-machine capable...... hiện toàn bộ
Non-uniform interpolatory curve subdivision with edge parameters built upon compactly supported fundamental splinesSpringer Science and Business Media LLC - Tập 51 - Trang 781-808 - 2011
Carolina Vittoria Beccari, Giulio Casciola, Lucia Romani
In this paper we present a family of Non-Uniform Local Interpolatory (NULI) subdivision schemes, derived from compactly supported interpolatory fundamental splines with non-uniform knots (NULIFS). For this spline family, the knot-partition is defined by a sequence of break points and by one additional knot, arbitrarily placed along each knot-interval. The resulting refinement algorithms are linear...... hiện toàn bộ
Numerical integration based on bivariate quadratic spline quasi-interpolants on Powell-Sabin partitionsSpringer Science and Business Media LLC - Tập 53 - Trang 175-192 - 2012
P. Sablonnière, D. Sbibih, M. Tahrichi
In this paper we generate and study new cubature formulas based on spline quasi-interpolants in the space of quadratic Powell-Sabin splines on nonuniform triangulations of a polygonal domain in ℝ2. By using a specific refinement of a generic triangulation, optimal convergence orders are obtained for some of these rules. Numerical tests are presented for illustrating the theoretical results.
Two new approaches for solving elliptic obstacle problems using discontinuous Galerkin methodsSpringer Science and Business Media LLC - Tập 62 - Trang 89-124 - 2021
Sharat Gaddam, Thirupathi Gudi, Kamana Porwal
The main aim of this article is to present two new ways to solve the elliptic obstacle problem by using discontinuous Galerkin finite element methods. In Gaddam and Gudi (Comput Methods Appl Math 18:223–236, 2018.
https://doi.org/10.1515/cmam-2017-0018...... hiện toàn bộ