Abstract
A number of useful bivariate spline methods are global in nature, i.e., all of the coefficients of an approximating spline must be computed at one time. Typically this involves solving a system of linear equations. Examples include several well-known methods for fitting scattered data, such as the minimal energy, least-squares, and penalized least-squares methods. Finite-element methods for solving boundary-value problems are also of this type. It is shown here that these types of globally-defined splines can be efficiently computed, provided we work with spline spaces with stable local minimal determining sets.
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Schumaker, L.L. Computing bivariate splines in scattered data fitting and the finite-element method. Numer Algor 48, 237–260 (2008). https://doi.org/10.1007/s11075-008-9175-x
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DOI: https://doi.org/10.1007/s11075-008-9175-x