
June 16, 2015 13:40 PSP Book - 9in x 6in 08-Yong-Ching-Lim-c08
Chapter 8
Ramanujan-Sums and the
Representation of Periodic Sequences
Palghat P. Vaidyanathan
California Institute of Technology, Pasadena, CA 91125, USA
ppvnath@systems.caltech.edu
8.1 Introduction
In planning a chapter for this book celebrating the career achieve-
ments of Professor Tony Constantinides, we spent some time
wondering what might be best liked by Tony. Some reflection
reminded us that throughout his career Tony has conducted his
research based on solid classical roots, while at the same time always
bringing in fresh daisy-like novelty into his work, to suit modern
applications.