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• W2018713086 abstract "We study the smoothness of quasi-uniform bivariate subdivision. A quasi-uniform bivariate scheme consists of different uniform rules on each side of the y-axis, far enough from the axis, some different rules near the y-axis, and is uniform in the y-direction. For schemes that generate polynomials up to degree m, we derive a sufficient condition for Cm continuity of the limit function, which is simple enough to be used in practice. It amounts to showing that the joint spectral radius of a certain pair of matrices has to be less than 2−m. We also relate the Hölder exponent of the mth order derivatives to that joint spectral radius. The main tool is an extension of existing analysis techniques for uniform subdivision schemes, although a different proof is required for the quasi-uniform case. The same idea is also applicable to the analysis of quasi-uniform subdivision processes in higher dimension. Along with the analysis we present a ‘tri–quad’ scheme, which is combined of a scheme on a triangular grid on the half plane x<0 and a scheme on a square grid on the other half plane x>0 and special rules near the y-axis. Using the new analysis tools it is shown that the tri–quad scheme is globally C2." @default.
• W2018713086 created "2016-06-24" @default.
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• W2018713086 date "2003-07-01" @default.
• W2018713086 modified "2023-09-30" @default.
• W2018713086 title "Analysis of quasi-uniform subdivision" @default.
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• W2018713086 doi "https://doi.org/10.1016/s1063-5203(03)00031-9" @default.
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