Results 11 to 20 of about 21,084 (200)
Riesz basis for strongly continuous groups
Journal of Differential Equations, 2010 17 ...
Hans Zwart
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The expansion of a semigroup and a Riesz basis criterion
Journal of Differential Equations, 2005 Let \(\mathcal{A}\) be the generator for a strongly continuous semigroup \(T(t)\) on a Hilbert space \(X\). Suppose that the singular set for \(\mathcal{A}\) can be split into two parts \(\sigma(\mathcal{A})=\sigma_1(\mathcal{A})\cup\sigma_2(\mathcal{A})\), where \(\sigma_2(\mathcal{A})\) consists all isolated eigenvalues. Under the assumption that the
Xu, GQ, Yung, SP
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Non-Parametric Regression and Riesz Estimators
Axioms, 2023 In this paper, we consider a non-parametric regression model relying on Riesz estimators. This linear regression model is similar to the usual linear regression model since they both rely on projection operators.
Christos Kountzakis +1 more
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The Riesz basis property of an indefinite Sturm-Liouville problem with non-separated boundary conditions [PDF]
, 2013 We consider a regular indefinite Sturm-Liouville eigenvalue problem \{$-f" + q f = \lambda r f$} on $[a,b]$ subject to general self-adjoint boundary conditions and with a weight function $r$ which changes its sign at finitely many, so-called turning ...
Fleige, Andreas +2 more
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A Riesz Basis Galerkin Method for the Tempered Fractional Laplacian [PDF]
SIAM Journal on Numerical Analysis, 2018 28 pages, 2 ...
Zhijiang Zhang +2 more
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Biframes and some of their properties
Journal of Inequalities and Applications, 2022 Recently, frame multipliers, pair frames, and controlled frames have been investigated to improve the numerical efficiency of iterative algorithms for inverting the frame operator and other applications of frames. In this paper, the concept of biframe is
Maryam Firouzi Parizi +2 more
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Delone sets and Riesz basis [PDF]
Proceedings of the Japan Academy, Series A, Mathematical Sciences, 1998 A standard technique of obtaining a Riesz basis for a Hilbert space is by considering exponential maps over a periodic set. The author obtains analogues of the well-known Kadec's 1/4-theorem by replacing the periodic set with a sufficiently close Delone set and constructs Riesz bases for the Hilbert spaces \(L^2 (W_A(0))\) and \(H^1 [-\pi,\pi]\) (where
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Strong summability methods in a Riesz-type family; pp. 238–250 [PDF]
Proceedings of the Estonian Academy of Sciences, 2011 We continue our studies on Riesz-type families of summability methods for functions and sequences, started in (Proc. Estonian Acad. Sci., 2008, 57, 70â80) and (Math. Model. Anal., 2010, 15, 103â112). Strong summability methods defined on the basis of
Anna Šeletski, Anne Tali
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Binary Operations in Metric Spaces Satisfying Side Inequalities
Mathematics, 2021 The theory of metric spaces is a convenient and very powerful way of examining the behavior of numerous mathematical models. In a previous paper, a new operation between functions on a compact real interval called fractal convolution has been introduced.
María A. Navascués +2 more
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Binary basic splines in MRA [PDF]
Известия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2021 $B$-splines were introduced by Carry and Schoenberg. Constructed on a uniform mesh and defined in terms of convolutions, such splines generate a Riesz MRA.
Chumachenko, Sergei A.
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