Mathematics (Dec 2022)
<i>C</i><sup>1</sup>-Cubic Quasi-Interpolation Splines over a CT Refinement of a Type-1 Triangulation
Abstract
C1 continuous quasi-interpolating splines are constructed over Clough–Tocher refinement of a type-1 triangulation. Their Bernstein–Bézier coefficients are directly defined from the known values of the function to be approximated, so that a set of appropriate basis functions is not required. The resulting quasi-interpolation operators reproduce cubic polynomials. Some numerical tests are given in order to show the performance of the approximation scheme.
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