Results 71 to 80 of about 550,652 (221)

Fractional gaussian noise: Spectral density and estimation methods

open access: yesJournal of Time Series Analysis, EarlyView.
The fractional Brownian motion (fBm) process, governed by a fractional parameter H∈(0,1), is a continuous‐time Gaussian process with its increment being the fractional Gaussian noise (fGn). This article first provides a computationally feasible expression for the spectral density of fGn.
Shuping Shi, Jun Yu, Chen Zhang
wiley   +1 more source

Universality Theorems for Some Composite Functions

open access: yesMathematical Modelling and Analysis, 2016
In [5], it was proved that a collection consisting from Dirichlet L-functions and periodic Hurwitz zeta-functions is universal in the sense that the shifts of those functions approximate simultaneously a given collection of analytic functions.
Kęstutis Janulis   +3 more
doaj   +1 more source

Safety Filters Against Actuator Attacks

open access: yesInternational Journal of Robust and Nonlinear Control, Volume 35, Issue 9, Page 3640-3657, June 2025.
ABSTRACT This manuscript focuses on mitigating the effect of deception attacks on control signals, that is, in the presence of an adversary that tampers with data coming from the controller to the system actuators in order to degrade the plant performance.
Cédric Escudero   +4 more
wiley   +1 more source

A weighted limit theorem for periodic Hurwitz zeta-function

open access: yesLietuvos Matematikos Rinkinys, 2012
In the paper, a weighted limit theorem for weakly convergent probability measures on the complex plane for the periodic Hurwitz zeta function is obtained.
Oleg Lukašonok
doaj   +1 more source

Jacobian elliptic fibrations on K3s with a non‐symplectic automorphism of order 3

open access: yesMathematische Nachrichten, Volume 298, Issue 5, Page 1758-1788, May 2025.
Abstract Let X$X$ be a K3 surface admitting a non‐symplectic automorphism σ$\sigma$ of order 3. Building on work by Garbagnati and Salgado, we classify the Jacobian elliptic fibrations on X$X$ with respect to the action of σ$\sigma$ on their fibers. If the fiber class of a Jacobian elliptic fibration on NS(X)$\operatorname{NS}(X)$ is fixed by σ$\sigma$,
Felipe Zingali Meira
wiley   +1 more source

Fractional derivative of the Hurwitz ζ-function and chaotic decay to zero

open access: yesJournal of King Saud University: Science, 2016
In this paper the fractional order derivative of a Dirichlet series, Hurwitz zeta function and Riemann zeta function is explicitly computed using the Caputo fractional derivative in the Ortigueira sense.
C. Cattani, E. Guariglia
doaj   +1 more source

The Multiple Hurwitz Zeta Function and the Multiple Hurwitz-Euler Eta Function [PDF]

open access: yesTaiwanese Journal of Mathematics, 2011
Almost eleven decades ago, Barnes introduced and made a \linebreak systematic investigation on the multiple Gamma functions $\Gamma_n$. In about the middle of 1980s, these multiple Gamma functions were revived in the study of the determinants of Laplacians on the $n$-dimensional unit sphere ${\bf S}^n$ by using the multiple Hurwitz zeta functions ...
Choi, Junesang, Srivastava, H. M.
openaire   +3 more sources

Some Weighted Sum Formulas for Multiple Zeta, Hurwitz Zeta, and Alternating Multiple Zeta Values

open access: yesJournal of Mathematics, 2021
We perform a further investigation for the multiple zeta values and their variations and generalizations in this paper. By making use of the method of the generating functions and some connections between the higher-order trigonometric functions and the ...
Yuan He, Zhuoyu Chen
doaj   +1 more source

On a common refinement of Stark units and Gross–Stark units

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 4, April 2025.
Abstract The purpose of this paper is to formulate and study a common refinement of a version of Stark's conjecture and its p$p$‐adic analogue, in terms of Fontaine's p$p$‐adic period ring. We construct period‐ring‐valued functions under a generalization of Yoshida's conjecture on the transcendental parts of CM‐periods.
Tomokazu Kashio
wiley   +1 more source

Vanishing of the integral of the Hurwitz zeta Function [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2002
A proof is given that the improper Riemann integral of ζ(s, a) with respect to the real parameter a, taken over the interval (0, 1], vanishes for all complex s with ℜ(s) < 1. The integral does not exist (as a finite real number) when ℜ(s) ≥ 1.
openaire   +3 more sources

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