50 citations
- Donetsk National Medical UniversityUA2 papers
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- Technische Universität BerlinDE2 papers
- Dynamic Systems (United States)US1 paper
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math.CA2010★ 13 cited
Darboux transformations of Jacobi matrices and Padé approximation
Maxim Derevyagin, Vladimir Derkach
Let J be a monic Jacobi matrix associated with the Cauchy transform F of a probability measure. We construct a pair of the lower and upper triangular block matrices L and U such th…
math.CA2010★ 1 cited
Exact estimation of an approximation of some classes of differentiable functions by convolution operators
Viktor P. Zastavnyi
Nikol'skii known theorem for the kernels satisfying a condition , is proved and for kernels from wider class. Explicit formulas for calculating the value of an approximation…