Results 11 to 20 of about 13,102 (285)

A Remark on Cosine Families [PDF]

open access: yesProceedings of the American Mathematical Society, 1980
Let C ( t ) , t
Samuel M. Rankin
openaire   +2 more sources

The Growth-Rate of Cosine Families

open access: yesJournal of Mathematical Analysis and Applications, 1995
The authors study the growth rate of a cosine family of operators generated by a linear operator \(A\) in terms of the resolvent of \(A\) and the semigroup generated by \(A\).
Delaubenfels, R., Piskarev, S.
openaire   +3 more sources

Cosine families of operators in a class of Fréchet spaces [PDF]

open access: yesProyecciones (Antofagasta), 2018
M. sova [10] proved that the infinitesimal generator of all uniformly continuous cosine family, of operators in Banach space, is a bounded operator. We show by counter-example that the result mentioned above is not true in general on Fréchet spaces, and we prove that the infinitesimal generator of an uniformly continuous cosine family of operators in a
Hassani, Rachid Ameziane   +3 more
openaire   +4 more sources

Zero-two law for cosine families [PDF]

open access: yesJournal of Evolution Equations, 2015
For $\left(C(t)\right)_{t \geq 0}$ being a strongly continuous cosine family on a Banach space, we show that the estimate $\limsup_{t\to 0^{+}}\|C(t) - I\| <2$ implies that $C(t)$ converges to $I$ in the operator norm. This implication has become known as the zero-two law.
Schwenninger, F.L., Zwart, Hans
openaire   +4 more sources

Transmuted cosine Topp-Leone G family of distributions: properties and applications

open access: yesJournal of Nigerian Society of Physical Sciences
In contemporary data analysis, the need for flexible and adaptable probabilistic models capable of capturing complex dependencies and tail behaviors in real-life datasets has become increasingly apparent.
Abdulhameed Osi   +4 more
doaj   +3 more sources

Interval-Valued Intuitionistic Fuzzy Ordered Weighted Cosine Similarity Measure and Its Application in Investment Decision-Making [PDF]

open access: yesComplexity, 2017
We present the interval-valued intuitionistic fuzzy ordered weighted cosine similarity (IVIFOWCS) measure in this paper, which combines the interval-valued intuitionistic fuzzy cosine similarity measure with the generalized ordered weighted averaging ...
Donghai Liu, Xiaohong Chen, Dan Peng
doaj   +2 more sources

Evolution of Spatiotemporal Intensity of Partially Coherent Pulsed Beams with Spatial Cosine-Gaussian and Temporal Laguerre–Gaussian Correlations in Still, Pure Water

open access: yesPhotonics, 2021
A new family of partially coherent pulsed beams with spatial cosine-Gaussian and temporal Laguerre–Gaussian correlations, named spatial cosine-Gaussian and temporal Laguerre–Gaussian correlated Schell-model (SCTLGSM) pulsed beams, is introduced.
Chaoliang Ding   +4 more
doaj   +2 more sources

A zero-sqrt(5)/ 2 law for cosine families

open access: yes, 2015
Let $a \in \R,$ and let $k(a)$ be the largest constant such that $sup\vert cos(na)-cos(nb)\vert \textless{} k(a)$ for $b\in \R$ implies that $b \in \pm a+2π\Z. $ We show that if a cosine sequence $(C(n))\_{n\in \Z}$ with values in a Banach algebra $A$ satisfies $sup\_{n\ge 1}\Vert C(n) -cos(na).1\_A\Vert \textless{} k(a),$ then $C(n)=cos(na)$ for $n\in
Esterle, Jean
core   +5 more sources

On the development of new cosine-based probabilistic methods with applications to univariate and bivariate analyses of the wind speed energy

open access: yesHeliyon, 2023
So far in the literature, a number of probability distributions have been successfully implemented for analyzing the wind speed and energy data sets. However, there is no published work on modeling and analyzing the wind speed and energy data sets with ...
Badr Alnssyan, Mohammed Ahmed Alomair
doaj   +1 more source

Cosine families in GDP Quojection-Fréchet spaces

open access: yesBoletim da Sociedade Paranaense de Matemática, 2022
We prove that if the Quojection-Fréchet space $X$ is a Grothendieck space with the Dunford-Pettis property, then every $C_ {0}$-cosine family is necessarily uniformly continuous and therefore its infinitesimal generator is a continuous linear operator.
Rachid Ameziane Hassani   +3 more
openaire   +4 more sources

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