Doubly-weighted pseudo almost periodic functions. (English) Zbl 1247.42008

Diagana, T.

Afr. Diaspora J. Math. 12, No. 1, 121-136 (2011).

Inspired by the weighted Morrey spaces, the author introduces and studies a new class of functions called doubly-weighted pseudo-almost periodic functions (respectively, doubly-weighted pseudo-almost automorphic functions), which generalizes in a natural fashion weighted pseudo-almost periodic functions (respectively, weighted pseudo-almost automorphy). In addition to the above, the author also introduces the class of doubly-weighted pseudo-almost periodic functions of order \(k\) (respectively, doubly-weighted pseudo-almost automorphic functions of order \(k\)), where \(k\) is in \((0,1)\). The stability of the convolution, translation invariance, existence of a doubly-weighted mean for almost periodic functions, and a composition result are studied.

Reviewer: Valery Vladimirovich Volchkov (Donetsk)

MSC:

42A75	Classical almost periodic functions, mean periodic functions
34C27	Almost and pseudo-almost periodic solutions to ordinary differential equations

Keywords:

weighted pseudo-almost periodic; weight; doubly-weighted pseudo-almost periodic; doubly-weighted Bohr spectrum; doubly-weighted mean