
Approximation of the checkmark function
Nick Trefethen, January 2022

Prolate spheroidal wave functions
Nick Trefethen, April 2021

AAA approximation of a spline
Nick Trefethen, April 2021

Approximating the pth root by composite rational functions
Evan S. Gawlik and Yuji Nakatsukasa, October 2019

Rational approximation of the FermiDirac function
Nick Trefethen, July 2019

L1 inpainting in one dimension
Yuji Nakatsukasa and Nick Trefethen, July 2019

Best polynomial approximation in the L^1 norm
Yuji Nakatsukasa and Alex Townsend, July 2019

Rational approximation of monomials
Yuji Nakatsukasa and Nick Trefethen, May 2019

Approximating the square root by polynomials and rational functions
Yuji Nakatsukasa, May 2019

Rational approximation of abs(x) with minimax
Silviu Filip, Yuji Nakatsukasa, and Nick Trefethen, May 2017

AAA rational approximation
Nick Trefethen, December 2016

Edge detection in Chebfun
Nick Trefethen, November 2016

Approximating Pushnitski's reciprocal log function
Nick Trefethen, November 2016

Convergence bounds for entire functions
Nick Trefethen, April 2016

Accuracy of Legendre coefficients via aliasing
Yuji Nakatsukasa, April 2016

Accuracy of Chebyshev coefficients via aliasing
Yuji Nakatsukasa, April 2016

Eight Shades of Rational Approximation
Mohsin Javed and Nick Trefethen, January 2016

Noisy functions in Chebfun
Nick Trefethen, December 2015

Chebfuns from equispaced data
Nick Trefethen, April 2015

Odd and even best approximations
Mohsin Javed and Nick Trefethen, March 2015

Nearest orthonormal functions
Behnam Hashemi, December 2014

Gallery and Gallerytrig
Hrothgar and Nick Trefethen, December 2014

Smooth functions of compact support
Nick Trefethen, July 2014

Chebfuns of noisy functions with discontinuities
Nick Trefethen, July 2014

CF approximation 30 years ago
Nick Trefethen and Mohsin Javed, July 2014

Digital filters via CF approximation
Nick Trefethen, April 2014

Resolution of wiggly functions
Nick Hale and Nick Trefethen, October 2013

Leastsquares approximation in Chebfun
Alex Townsend, October 2013

Approximations and oscillation of error
Mohsin Javed, October 2013

A pathological function of Weierstrass
Hrothgar, October 2013

Splines
Nick Trefethen, February 2013

Rational approximation to the exponential in a complex region
Yuji Nakatsukasa and Stefan Guettel, July 2012

Bsplines and convolution
Nick Trefethen, July 2012

Bernstein polynomials
Nick Trefethen, May 2012

Summing a divergent series
Nick Trefethen and Stefan Guettel, April 2012

A greedy algorithm for choosing interpolation points
Nick Trefethen, November 2011

Chebyshev interpolation of oscillatory entire functions
Mark Richardson, October 2011

Rational interpolation, robust and nonrobust
Nick Trefethen, August 2011

Orthogonal polynomials via the GramSchmidt process
Nick Hale, June 2011

Local complexity of a function
Nick Trefethen, June 2011

Halphen's constant for approximation of
exp(x)
Nick Trefethen, May 2011

Absolute value approximations by rationals
Nick Trefethen, May 2011

Lebesgue functions and Lebesgue constants
Nick Trefethen, November 2010

A wiggly function and its best approximations
Ricardo Pachon and Nick Trefethen, November 2010

Best approximation with the REMEZ command
Nick Trefethen, September 2010

The gamma function and its poles
Nick Hale, December 2009