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On the Chebyshev approximation of a function with two variables
2015
There is presented an approach to find an approximation polynomial of a function with two variables based on the two dimensional discrete Fourier transform. The approximation polynomial is expressed through Chebyshev polynomials. There is given an uniform convergence result.
Keywords:
- Chebyshev's sum inequality
- Mathematical analysis
- Mathematical optimization
- Mathematics
- Equioscillation theorem
- Eigenvalues and eigenvectors of the second derivative
- Chebyshev iteration
- Chebyshev equation
- Chebyshev polynomials
- Chebyshev nodes
- Spouge's approximation
- Matrix polynomial
- Minimax approximation algorithm
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