Orthogonal Polynomials on the Unit Circle with Verblunsky Coefficients Defined by the Skew-shift

نویسنده

  • HELGE KRÜGER
چکیده

I give an example of a family of orthogonal polynomials on the unit circle with Verblunsky coefficients given by the skew-shift for which the associated measures are supported on the entire unit circle and almost-every Aleksandrov measure is pure point. Furthermore, I show in the case of the two dimensional skew-shift the zeros of para-orthogonal polynomials obey the same statistics as an appropriate irrational rotation. The proof is based on an analysis of the associated CMV matrices.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Matrix measures on the unit circle, moment spaces, orthogonal polynomials and the Geronimus relations

We study the moment space corresponding to matrix measures on the unit circle. Moment points are characterized by non-negative definiteness of block Toeplitz matrices. This characterization is used to derive an explicit representation of orthogonal polynomials with respect to matrix measures on the unit circle and to present a geometric definition of canonical moments. It is demonstrated that t...

متن کامل

Coefficients of Orthogonal Polynomials on the Unit Circle and Higher Order Szegő Theorems

Let μ be a non-trivial probability measure on the unit circle ∂D, w the density of its absolutely continuous part, αn its Verblunsky coefficients, and Φn its monic orthogonal polynomials. In this paper we compute the coefficients of Φn in terms of the αn. If the function logw is in L(dθ), we do the same for its Fourier coefficients. As an application we prove that if αn ∈ ` and Q(z) ≡ ∑N m=0 qm...

متن کامل

Verblunsky coefficients with Coulomb-type decay

We also consider the monic orthogonal polynomials Φn(z). They obey the Szegő recursion Φn+1(z) = zΦn(z)− αnΦn(z), where Φn(z) = z Φn(1/z). The αn are called Verblunsky coefficients and they belong to the unit disk D = {z ∈ C : |z| < 1}. Conversely, every α ∈ ×n=0D corresponds to a unique measure. See [14, 15, 16] for background material on orthogonal polynomials on the unit circle (OPUC). In th...

متن کامل

Rakhmanov's theorem for orthogonal matrix polynomials on the unit circle

Rakhmanov’s theorem for orthogonal polynomials on the unit circle gives a sufficient condition on the orthogonality measure for orthogonal polynomials on the unit circle, in order that the reflection coefficients (the recurrence coefficients in the Szegő recurrence relation) converge to zero. In this paper we give the analog for orthogonal matrix polynomials on the unit circle. 1. Rakhmanov’s t...

متن کامل

Szego transformations and Nth order associated polynomials on the unit circle

In this paperwe analyze the Stieltjes functions defined by the Szegő inverse transformation of a nontrivial probabilitymeasure supported on the unit circle such that the corresponding sequence of orthogonal polynomials is defined by either backward or forward shifts in their Verblunsky parameters. Such polynomials are called anti-associated (respectively associated) orthogonal polynomials. Thus...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2011