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Approximation of the checkmark function
Nick Trefethen, January 2022
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Prolate spheroidal wave functions
Nick Trefethen, April 2021
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AAA approximation of a spline
Nick Trefethen, April 2021
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Approximating the pth root by composite rational functions
Evan S. Gawlik and Yuji Nakatsukasa, October 2019
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Rational approximation of the Fermi-Dirac function
Nick Trefethen, July 2019
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L1 inpainting in one dimension
Yuji Nakatsukasa and Nick Trefethen, July 2019
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Best polynomial approximation in the L^1 norm
Yuji Nakatsukasa and Alex Townsend, July 2019
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Rational approximation of monomials
Yuji Nakatsukasa and Nick Trefethen, May 2019
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Approximating the square root by polynomials and rational functions
Yuji Nakatsukasa, May 2019
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Rational approximation of abs(x) with minimax
Silviu Filip, Yuji Nakatsukasa, and Nick Trefethen, May 2017
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AAA rational approximation
Nick Trefethen, December 2016
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Edge detection in Chebfun
Nick Trefethen, November 2016
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Approximating Pushnitski's reciprocal log function
Nick Trefethen, November 2016
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Convergence bounds for entire functions
Nick Trefethen, April 2016
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Accuracy of Legendre coefficients via aliasing
Yuji Nakatsukasa, April 2016
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Accuracy of Chebyshev coefficients via aliasing
Yuji Nakatsukasa, April 2016
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Eight Shades of Rational Approximation
Mohsin Javed and Nick Trefethen, January 2016
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Noisy functions in Chebfun
Nick Trefethen, December 2015
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Chebfuns from equispaced data
Nick Trefethen, April 2015
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Odd and even best approximations
Mohsin Javed and Nick Trefethen, March 2015
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Nearest orthonormal functions
Behnam Hashemi, December 2014
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Gallery and Gallerytrig
Hrothgar and Nick Trefethen, December 2014
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Smooth functions of compact support
Nick Trefethen, July 2014
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Chebfuns of noisy functions with discontinuities
Nick Trefethen, July 2014
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CF approximation 30 years ago
Nick Trefethen and Mohsin Javed, July 2014
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Digital filters via CF approximation
Nick Trefethen, April 2014
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Resolution of wiggly functions
Nick Hale and Nick Trefethen, October 2013
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Least-squares approximation in Chebfun
Alex Townsend, October 2013
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Approximations and oscillation of error
Mohsin Javed, October 2013
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A pathological function of Weierstrass
Hrothgar, October 2013
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Splines
Nick Trefethen, February 2013
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Rational approximation to the exponential in a complex region
Yuji Nakatsukasa and Stefan Guettel, July 2012
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B-splines and convolution
Nick Trefethen, July 2012
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Bernstein polynomials
Nick Trefethen, May 2012
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Summing a divergent series
Nick Trefethen and Stefan Guettel, April 2012
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A greedy algorithm for choosing interpolation points
Nick Trefethen, November 2011
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Chebyshev interpolation of oscillatory entire functions
Mark Richardson, October 2011
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Rational interpolation, robust and non-robust
Nick Trefethen, August 2011
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Orthogonal polynomials via the Gram-Schmidt process
Nick Hale, June 2011
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Local complexity of a function
Nick Trefethen, June 2011
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Halphen's constant for approximation of
exp(x)Nick Trefethen, May 2011
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Absolute value approximations by rationals
Nick Trefethen, May 2011
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Lebesgue functions and Lebesgue constants
Nick Trefethen, November 2010
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A wiggly function and its best approximations
Ricardo Pachon and Nick Trefethen, November 2010
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Best approximation with the REMEZ command
Nick Trefethen, September 2010
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The gamma function and its poles
Nick Hale, December 2009