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- W4301420332 abstract "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 a splitting mode that finds an optimal splitting through recursive bisection, but the result has no global smoothness unless conditions are imposed explicitly at the breakpoints. An alternative is to split the domain into overlapping intervals and use an infinitely smooth partition of unity to blend the local Chebyshev interpolants. A simple divide-and-conquer algorithm similar to Chebfun's splitting mode can be used to find an overlapping splitting adapted to features of the function. The algorithm implicitly constructs the partition of unity over the subdomains. This technique is applied to explicitly given functions as well as to the solutions of singularly perturbed boundary value problems." @default.
- W4301420332 created "2022-10-05" @default.
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- W4301420332 date "2017-08-08" @default.
- W4301420332 modified "2023-09-27" @default.
- W4301420332 title "An adaptive partition of unity method for Chebyshev polynomial interpolation" @default.
- W4301420332 doi "https://doi.org/10.48550/arxiv.1708.02611" @default.
- W4301420332 hasPublicationYear "2017" @default.
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