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Now showing items 1-10 of 12

#### Again on the weak law in martingale type p Banach spaces [Article]

(Universidad de Extremadura, 1999)

#### On the linearization problem involving Pochhammer symbols and their q-analogues [Article]

(Elsevier, 1999-07-15)

In this paper we present a simple recurrent algorithm for solving the linearization problem involving some families of q-polynomials in the exponential lattice x(s)=c1qs+c3. Some simple examples are worked out in detail.

#### Holomorphic functions having large images under the action of differential operators [Article]

(Elsevier, 1999-02-15)

We prove in this note that, given a simply connected domain G in the complex plane and a sequence of infinite order linear differential operators generated by entire functions of subexponential type satisfying suitable ...

#### Hypercyclic sequences of differential and antidifferential operators [Article]

(Elsevier, 1999-02)

In this paper, we provide some extensions of earlier results about hypercyclicity of some operators on the Fréchet space of entire functions of several complex variables. Specifically, we generalize in several directions ...

#### A Seidel-Walsh theorem with linear differential operators [Article]

(Springer, 1999-05)

Assume that {Sn}∞1 is a sequence of automorphisms of the open unit disk D and that {Tn}∞1 is a sequence of linear differential operators with constant coefficients, both of them satisfying suitable conditions. We prove ...

#### Two-weight, weak-type norm inequalities for singular integral operators [Article]

(International Press, 1999)

We give a sufficient condition for singular integral operators and, more generally, Calder´on-Zygmund operators to satisfy the weak (p, p) inequality u({x ∈ R n : |T f(x)| > t}) ≤ C / tp Z Rn |f|p v dx, 1 < p < ∞. Our ...

#### On a result of W. A. Kirk [Article]

(University of Houston, 1999)

W. A. Kirk has recently proved a constructive fixed point theorem for continuous mappings in compact hyperconvex metric spaces [6]. In the present work we use the concept of hyperconvex hull of a metric space to obtain ...

#### Degenerate weak convergence of row sums for arrays of random elements in stable type p Banach spaces [Article]

(Institute of Mathematics, Academica Sinica, 1999-09)

For an array of rowwise independent random elements {Vnj , j ≥ 1, n ≥ 1} in a real separable, stable type p Banach space X and an array of constants {anj , j ≥ 1, n ≥ 1}, general weak laws of large numbers of the forms (i) ...

#### The essential norm of a composition operator on Bloch spaces [Article]

(Mathematical Sciences Publishers, 1999-04)

We express the essential norm of a composition operator on the Bloch space and the little Bloch space as the asymptotic upper bound of a quantity involving the inducing map and the Pick-Schwarz Lemma. As a consequence, we ...

#### Q-classical orthogonal polynomials: a very classical approach [Article]

(Kent State University, 1999)

The q-classical orthogonal polynomials defined by Hahn satisfy a Sturm-Liouville type equation in geometric differences. Working with this, we classify the q−classical polynomials in twelve families according to the zeros ...