Abstract We consider continuous cocycles arising from CMV and Jacobi matrices. Assuming that the Verblunsky coefficients arise generalized skew-shifts, we prove uniform hyperbolicity of associated is $C^0$ -dense. This implies matrices have a Cantor spectrum for generic sampling map.

We investigate the topological entropy of a green interval map. Defining the complexity we estimate from above the topological entropy of a green interval map with a given complexity. The main result of the paper — stated in Theorem 0.2 — should be regarded as a completion of results of [4]. 0. Introduction and main result The purpose of this paper is to evaluate the topological entropy of gree...

In a series of papers (??) we studied in detail the statistical properties of an interpolation technique widely used in astronomy. In particular, we considered the average interpolated map and its covariance under the hypotheses that the map is obtained by smoothing unbiased measurements of an unknown field, and that the measurements are uniformly distributed on the sky. In this paper we genera...

Let Φ be an irreducible crystallographic root system with Weyl group W , coroot lattice Q̌ and Coxeter number h. Recently the second named author defined a uniform W -isomorphism ζ between the finite torus Q̌/(mh + 1)Q̌ and the set of non-nesting parking functions Park(Φ). If Φ is of type An−1 and m = 1 this map is equivalent to a map defined on labelled Dyck paths that arises in the study of the ...

The minimal twist map introduced by Abdesselam et al [1] for the nonstandard (Jordanian) quantum sl(2,R) algebra is used to construct the twist maps for two different non-standard quantum deformations of the (1+1) Schrödinger algebra. Such deformations are, respectively, the symmetry algebras of a space and a time uniform lattice discretization of the (1 + 1) free Schrödinger equation. It is sh...

introduction: nowadays, imaging of the myocardial perfusion (mpi) using the single photon emission tomography (spet) in the diagnosis of coronary artery disease, especially myocardial ischemia, is of great importance. in contrast to the coronary artery angiography, mpi is non-invasive, less expensive and more physiological. unfortunately, this image is affected by the some artifacts. these arti...

This paper describes a segmentation technique for 2D interventional MR images of liver tumours. Our goal is to extract the targeted tumour with high accuracy and reliability. Two features of MR data were likely to challenge existing segmentation methods. The first one is the inhomogeneous intratumoral texture, while the second one is the “blurred” appearance and the non-uniform sharpness of the...

Currently, the variety of expressive extensions and different semantics created for logic programs with negation is diverse and heterogeneous, and there is a lack of comprehensive comparative studies which map out the multitude of perspectives in a uniform way. Most recently, however, a new methodology has been proposed which allows one to derive uniform characterizations of different declarati...

Berestovskii and Plaut introduced the concept of a coverable space [1] when developing their theory of generalized universal covering maps for uniform spaces. If a space is coverable and chain connected then it has a generalized universal covering map. Brodskiy, Dydak, LaBuz, and Mitra introduced the concept of a uniformly joinable space [2] when developing a theory of generalized uniform cover...

We consider MAP estimators for structured prediction with exponential family models. In particular, we concentrate on the case that efficient algorithms for uniform sampling from the output space exist. We show that under this assumption (i) exact computation of the partition function remains a hard problem, and (ii) the partition function and the gradient of the log partition function can be a...