In engineering analysis we must often predict the behavior of a univariate function — a relation between an input (independent variable) and an output (dependent variable) — in order to design or… Expand

To the memory of S. Sidon. Let 0 < a, < a,. .. be an infinite sequence of positive integers. Denote by f(n) the number of solutions of n=a i +a;. About twenty years ago, SIDON 1) raised the question… Expand

1. We start by explaining two groups of theorems and we shall derive both from a common source. P. Bloch and G. P6lya' investigated first the question of giving an upper estimation of the number R of… Expand