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An Examination of New Paradigms for Spline Approximations
Authors:Christoph Witzgall  David E Gilsinn  Marjorie A McClain
Affiliation:National Institute of Standards and Technology, Gaithersburg, MD 20899-8910
Abstract:Lavery splines are examined in the univariate and bivariate cases. In both instances relaxation based algorithms for approximate calculation of Lavery splines are proposed. Following previous work Gilsinn, et al. 7] addressing the bivariate case, a rotationally invariant functional is assumed. The version of bivariate splines proposed in this paper also aims at irregularly spaced data and uses Hseih-Clough-Tocher elements based on the triangulated irregular network (TIN) concept. In this paper, the univariate case, however, is investigated in greater detail so as to further the understanding of the bivariate case.
Keywords:bivariate splines  curve fitting  Delaunay triangulation  Gauss-Seidel iteration  Hsieh-Clough-Tocher elements  irregular data  Lavery splines  non-oscillatory splines  point clouds  surface fitting  thin beam  thin plate  triangulated irregular networks
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