Interval maps quasi-symmetrically conjugate to a piecewise affine map

Arithmetic Exponents in Piecewise-affine Planar Maps

We consider the growth of some indicators of arithmetical complexity of rational orbits of (piecewise) affine maps of the plane, with rational parameters. The exponential growth rates are expressed by a set of exponents; one exponent describes the growth rate of the so-called logarithmic height of the points of an orbit, while the others describe the growth rate of the size of such points, meas...

Periodicity of certain piecewise affine planar maps

In the past few decades, discontinuous piecewise affine maps have found considerable interest in the theory of dynamical systems. For an overview, we refer the reader to [1, 7, 12, 13, 17, 18], for particular instances to [29, 16, 25] (polygonal dual billiards), [15] (polygonal exchange transformations), [10, 31, 11, 8] (digital filters) and [19, 21, 22] (propagation of round-off errors in line...

Quasi-symmetry of Conjugacies between Interval Maps

The topological entropy of iterated piecewise affine maps is uncomputable

We show that it is impossible to compute (or even to approximate) the topological entropy of a continuous piecewise affine function in dimension four. The same result holds for saturated linear functions in unbounded dimension. We ask whether the topological entropy of a piecewise affine function is always a computable real number, and conversely whether every non-negative computable real numbe...

On the Susceptibility Function of Piecewise Expanding Interval Maps

We study the susceptibility function