On a class of orthogonalizers for exponential systems with real frequencies
We describe complete minimal families of exponential functions and Riesz bases of exponential functions which admit orthogonalizers of a special type. We obtain a complete description of all orthogonalizers of the class of complete minimal family of exponential functions under consideration and formulate a simple condition which guarantees the uniqueness of the orthogonalizer.
English version (Springer): Ukrainian Mathematical Journal 44 (1992), no. 8, pp 933-944.
Citation Example: Gubreev G. M., Ignatenko T. R. On a class of orthogonalizers for exponential systems with real frequencies // Ukr. Mat. Zh. - 1992. - 44, № 8. - pp. 1031–1044.