This classic textbook provides a unified treatment of spectral approximation for closed or bounded operators, as well as for matrices. Despite significant changes and advances in the field since it ...

For each sound source to be modelled, a source strength is determined in the direction of each microphone. Modelling is performed by minimising the difference between the measured cross-spectral ...

Fernández, Lidia and de la Iglesia, Manuel D. 2023. QBD Processes Associated with Jacobi–Koornwinder Bivariate Polynomials and Urn Models. Mediterranean Journal of Mathematics, Vol. 20, Issue. 6, ...