Ramanujan's sum (English, noun)
expansion: Ramanujan's sum (plural Ramanujan's sums)
Senses:
topics: mathematics
number-theory
sciences
glosses: A function, usually denoted c_q(n), of two positive integer variables q and n, defined by the formula c_q(n)=∑_(1<a≤q atop (a,q)=1)e^(2πi tfrac aqn),, where (a, q) = 1 means that a only takes on values coprime to q. It is used in the proof of Vinogradov's theorem.
Forms:
form: Ramanujan's sums
tags: plural