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Macro-elements and stable local bases for splines on Clough-Tocher triangulations

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Summary.

Macro-elements of arbitrary smoothness are constructed on Clough-Tocher triangle splits. These elements can be used for solving boundary-value problems or for interpolation of Hermite data, and are shown to be optimal with respect to spline degree. We conjecture they are also optimal with respect to the number of degrees of freedom. The construction provides local bases for certain superspline spaces defined over Clough-Tocher refinements of arbitrary triangulations. These bases are shown to be stable as a function of the smallest angle in the triangulation, which in turn implies that the associated spline spaces have optimal order approximation power.

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Received November 18, 1999 / Published online October 16, 2000

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Lai, MJ., Schumaker, L. Macro-elements and stable local bases for splines on Clough-Tocher triangulations. Numer. Math. 88, 105–119 (2001). https://doi.org/10.1007/PL00005435

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  • DOI: https://doi.org/10.1007/PL00005435

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