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Applied Mathematics and Nonlinear Sciences

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Available online: September 06, 2017

High-accuracy approximation of piecewise smooth functions using the Truncation and Encode approach

Sergio López-Ureña, Rosa Donat
Volume 2 - Issue 2.     Year 2017.     Pages 367–384.

DOI: 10.21042/AMNS.2017.2.00030


In the present work, we analyze a technique designed by Geraci et al. in cite{TE2014,TE2016} named the Truncate and Encode (TE) strategy. It was presented as a non-intrusive method for steady and non-steady Partial Differential Equations (PDEs) in Uncertainty Quantification (UQ), and as a weakly intrusive method in the unsteady case.

We analyze the TE algorithm applied to the approximation of functions, and in particular its performance for piecewise smooth functions. We carry out some numerical experiments, comparing the performance of the algorithm when using different linear and non-linear interpolation techniques and provide some recommendations that we find useful in order to achieve a high performance of the algorithm.

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Applied Mathematics, Nonlinear Sciences


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