We prove a structure theorem for multiplicative functions which states that an arbitrary bounded multiplicative function can be decomposed into two terms, one..
In this paper we develop a measure-theoretic method to treat problems in hypergraph theory. Our central theorem is a correspondence principle between thr..
Our approach to higher order Fourier analysis is to study the ultra product of finite (or compact) Abelian groups on which a new algebraic theory app..
We develop a theory of higher order structures in compact abelian groups. In the frame of this theory we prove general inverse theorems and regularity le..
For every natural number k we introduce the notion of k-th order convolution of functions on abelian groups. We study the group of convolution preserving..