LAUSR

this is a special issue of our journal FCAA (“Fractional Calculus and Applied Analysis”), dedicated to its 20th year and Vol. 20, and the 65th anniversary of its Editor-in-Chief Prof. Virginia Kiryakova, Dr.Sc. For this issue we have selected twelve papers that have been previously submitted to FCAA and accepted, and whose authors decided to dedicate them to these occasions. The issue contains both survey and research papers, and nine of these twelve papers have been contributed by the long-term Associate Editors or members of the Editorial Board of FCAA in order to mark the significant dates in the life of Professor Virginia Kiryakova and in the life of FCAA. There is no need to duplicate the table of contents here, so the readers are kindly invited to enjoy the papers, which all are related to Professor Virginia Kiryakova’s wide research interests.