An Adaptive Partition of Unity Method for Chebyshev Polynomial Interpolation
An Adaptive Partition of Unity Method for Chebyshev Polynomial Interpolation
For a function that is analytic on and around an interval, Chebyshev polynomial interpolation provides spectral convergence. However, if the function has a singularity close to the interval, the rate of convergence is near one. In these cases splitting the interval and using piecewise interpolation can accelerate convergence. Chebfun includes …