Results 31 to 40 of about 284,598 (280)
Forms, functional calculus, cosine functions and perturbation [PDF]
Banach Center Publications, 2007 In this article we describe properties of unbounded operators related to evolutionary problems. It is a survey article which also contains several new results. For instance we give a characterization of cosine functions in terms of mild well-posedness of the Cauchy problem of order 2, and we show that the property of having a bounded H°°-calculus is ...
Wolfgang Arendt, Charles J. K. Batty
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A New Extended Cosine—G Distributions for Lifetime Studies
Mathematics, 2021 In this article, we introduce a new extended cosine family of distributions. Some important mathematical and statistical properties are studied, including asymptotic results, a quantile function, series representation of the cumulative distribution and ...
Mustapha Muhammad +6 more
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A Conditional Symmetric Memristive System With Infinitely Many Chaotic Attractors
IEEE Access, 2020 A chaotic system with a hyperbolic function flux-controlled memristor is designed, which exhibits conditional symmetry and attractor growing. The newly introduced cosine function keeps the polarity balance when some of the variables get polarity inversed
Jiacheng Gu +4 more
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The Cosine-Sine Functional Equation on Semigroups [PDF]
Annales Mathematicae Silesianae, 2021 Abstract The primary object of study is the “cosine-sine” functional equation f(xy) = f(x)g(y)+g(x)f(y)+h(x)h(y) for unknown functions f, g, h : S → ℂ, where S is a semigroup. The name refers to the fact that it contains both the sine and cosine addition laws.
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Search for Tracker Potentials in Quintessence Theory [PDF]
, 2001 We report a significant finding in Quintessence theory that the the scalar fields with tracker potentials have a model-independent scaling behaviour in the expanding universe.
Johri V B +11 more
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Some Novel Cosine Similarity Measures Based on Complex Hesitant Fuzzy Sets and Their Applications
Journal of Mathematics, 2021 The theory of complex hesitant fuzzy set (CHFS) is a modification technique of the complex fuzzy set (CFS) to cope with awkward and unreliable information’s in daily life issues.
Ronnason Chinram +4 more
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Cosine and Sine Operators Related with Orthogonal Polynomial Sets on the Intervall [-1,1]
, 2005 The quantization of phase is still an open problem. In the approach of Susskind and Glogower so called cosine and sine operators play a fundamental role.
Abramowitz M +12 more
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Point-Symmetric Extension-Based Interval Shannon-Cosine Spectral Method for Fractional PDEs
Discrete Dynamics in Nature and Society, 2020 The approximation accuracy of the wavelet spectral method for the fractional PDEs is sensitive to the order of the fractional derivative and the boundary condition of the PDEs.
Ruyi Xing +4 more
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Group representations of bounded cosine functions. [PDF]
Journal für die reine und angewandte Mathematik (Crelles Journal), 1996 The paper characterizes in purely algebraic terms two classes of locally compact Abelian groups. One of these comprises all groups \(G\) such that every bounded continuous cosine function on \(G\) with values in a sequentially complete semitopological algebra with identity has a regular group representation.
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The group reduction for bounded cosine functions on UMD spaces
, 2007 It is shown that if A generates a bounded cosine operator function on a UMD space X, then i(-A)^{1/2} generates a bounded C_0-group.
Haase, Markus
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