Results 11 to 20 of about 144 (46)

The Vortex-like Behavior of the Riemann Zeta Function to the Right of the Critical Strip [PDF]

open access: yes, 2020
Based on an equivalence relation that was established recently on exponential sums, in this paper we study the class of functions that are equivalent to the Riemann zeta function in the half-plane {s ∈ C : Res > 1}.
Sepulcre, Juan Matias, Vidal, Tomás
core   +2 more sources

The Bessel‐Struve intertwining operator on ℂ and mean‐periodic functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 59, Page 3171-3185, 2004., 2004
We give a description of all transmutation operators from the Bessel‐Struve operator to the second‐derivative operator. Next we define and characterize the mean‐periodic functions on the space ℋ of entire functions and we characterize the continuous linear mappings from ℋ into itself which commute with Bessel‐Struve operator.
A. Gasmi, M. Sifi
wiley   +1 more source

Diophantine approximations and almost periodic functions

open access: yesDemonstratio Mathematica, 2017
In this paper we investigate the asymptotic behaviour of the classical continuous and unbounded almost periodic function in the Lebesgue measure.Using diophantine approximations we show that this function can be estimated by functions of polynomial type ...
Nawrocki Adam
doaj   +1 more source

On some classes of almost periodic functions in abstract spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 61, Page 3237-3247, 2004., 2004
We deal with C(n)‐almost periodic functions taking values in a Banach space. We give several properties of such functions, in particular, we investigate their behavior in view of differentiation as well as integration. The superposition operator acting in the space of such functions is also under consideration.
Dariusz Bugajewski   +1 more
wiley   +1 more source

Bilinear littlewood-paley for circle and transference [PDF]

open access: yes, 2011
In this paper we have obtained the boundedness of bilinear Littlewood-Paley operators on the circle group T by using appropriate transference techniques.
Mohanty, Parasar, Shrivastava, Saurabh
core   +2 more sources

Block Toeplitz operators with frequency‐modulated semi‐almost periodic symbols

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 34, Page 2157-2176, 2003., 2003
This paper is concerned with the influence of frequency modulation on the semi‐Fredholm properties of Toeplitz operators with oscillating matrix symbols. The main results give conditions on an orientation‐preserving homeomorphism α of the real line that ensure the following: if b belongs to a certain class of oscillating matrix functions (periodic ...
A. Böttcher, S. Grudsky, I. Spitkovsky
wiley   +1 more source

Stepanov-like pseudo almost periodic functions on time scales and applications to dynamic equations with delay

open access: yesOpen Mathematics, 2018
In this paper, we introduce the concept of Sp-pseudo almost periodicity on time scales and present some basic properties of it, including the translation invariance, uniqueness of decomposition, completeness and composition theorem.
Tang Chao-Hong, Li Hong-Xu
doaj   +1 more source

Zeros of the Selberg zeta function for symmetric infinite area hyperbolic surfaces [PDF]

open access: yes, 2019
In the present paper we give a simple mathematical foundation for describing the zeros of the Selberg zeta functions ZX for certain very symmetric infinite area surfaces X. For definiteness, we consider the case of three funneled surfaces.
Pollicott, Mark, Vytnova, Polina
core   +1 more source

Commutants of the Dunkl Operators in C(R) [PDF]

open access: yes, 2006
2000 Mathematics Subject Classification: 44A35; 42A75; 47A16, 47L10, 47L80The Dunkl operators.* Supported by the Tunisian Research Foundation under 04/UR/15 ...
Dimovski, Ivan   +2 more
core   +1 more source

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