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20012026
most citedOn the inverse scattering problem for Jacobi matrices with the spectrum on an interval, a finite system of intervals or a Cantor set of positive length

43 citations · 194 across the 50 of their papers we have counts for

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math.CA2006★ 4 cited

Uniform approximation of sgn(x) by rational functions with prescribed poles

Franz Peherstorfer, Peter Yuditskii

For let be the error of the best approximation of the function $\sgn(x)$ on the two symmetric intervals by rational functions with the on…

math.CA2006

Uniform approximation of sgn(x) by polynomials and entire functions

Alexandre Eremenko, Peter Yuditskii

We study the best uniform approximation by polynomials of fixed degree of the function sgn(x) on the union of two intervals symmetric with respect to the origin. We obtain precise…