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On functions with bounded remainder

P. Hellekalek, Gerhard Larcher (1989)

Annales de l'institut Fourier

Let T : / / be a von Neumann-Kakutani q - adic adding machine transformation and let ϕ C 1 ( [ 0 , 1 ] ) . Put ϕ n ( x ) : = ϕ ( x ) + ϕ ( T x ) + ... + ϕ ( T n - 1 x ) , x / , n . We study three questions:1. When will ( ϕ n ( x ) ) n 1 be bounded?2. What can be said about limit points of ( ϕ n ( x ) ) n 1 ? 3. When will the skew product ( x , y ) ( T x , y + ϕ ( x ) ) be ergodic on / × ?

On integer points in polygons

Maxim Skriganov (1993)

Annales de l'institut Fourier

The phenomenon of anomaly small error terms in the lattice point problem is considered in detail in two dimensions. For irrational polygons the errors are expressed in terms of diophantine properties of the side slopes. As a result, for the t -dilatation, t , of certain classes of irrational polygons the error terms are bounded as n q t with some q > 0 , or as t ϵ with arbitrarily small ϵ > 0 .

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