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Title: C¹ hierarchical Riesz bases of Lagrange type on Powell-Sabin triangulations
Authors: Maes, Jan ×
Bultheel, Adhemar
Issue Date: Mar-2005
Publisher: Department of Computer Science, K.U.Leuven
Series Title: TW Reports vol:TW422
Abstract: In this paper we construct C¹ continuous piecewise quadratic hierarchical bases on Powell-Sabin triangulations of arbitrary polygonal domains in ℝ². Our bases are of Lagrange type instead of the usual Hermite type and we prove that they form strongly stable Riesz bases for the Sobolev spaces H^s(Ω) with s ∈ (1, 5/2). Especially the case s = 2 is of interest, because we can use the corresponding hierarchical basis for preconditioning fourth order elliptic equations leading to uniformly well-conditioned stiffness matrices. Compared to the hierarchical Riesz bases by Davydov and Stevenson our construction is simpler.
URI: 
Publication status: published
KU Leuven publication type: IR
Appears in Collections:Numerical Analysis and Applied Mathematics Section
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