Positive interpolatory quadrature formulas and para-orthogonal polynomials
It is established a relation between quadrature formulas in the interval \([-1,1]\) that approximate integrals of the form \[ I_w(f)=\inf^\pi_{-\pi}f(e^{i\theta})w(\theta)\,d\theta. \]
scientific article; zbMATH DE number 2173190