The Mathematical Institute, University of Oxford, Eprints Archive

An extension of Chebfun to two dimensions

Townsend, Alex and Trefethen, Lloyd N. (2013) An extension of Chebfun to two dimensions. Technical Report. SISC. (Submitted)



An object-oriented MATLAB system is described that extends the capabilities of Chebfun to smooth functions of two variables defined on rectangles. Functions are approximated to essentially machine precision by using iterative Gaussian elimination with complete pivoting to form “chebfun2” objects representing low rank approximations. Operations such as integration, differentiation, function evaluation, and transforms are particularly efficient. Global optimization, the singular value decomposition, and rootfinding are also extended to chebfun2 objects. Numerical applications are presented.

Item Type:Technical Report (Technical Report)
Subjects:O - Z > Sequences, series, summability
H - N > Numerical analysis
Research Groups:Numerical Analysis Group
ID Code:1669
Deposited By: Lotti Ekert
Deposited On:22 Feb 2013 09:54
Last Modified:29 May 2015 19:21

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