Results 101 to 110 of about 8,503 (184)
Characterizing Riesz bases via biorthogonal Bessel sequences
Carpathian Mathematical Publications, 2023 Recently D.T. Stoeva proved that if two Bessel sequences in a separable Hilbert space $\mathcal H$ are biorthogonal and one of them is complete in $\mathcal H$, then both sequences are Riesz bases for $\mathcal H$. This improves a well known result where completeness is assumed on both sequences. In this note we present an alternative proof of ...
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Riesz bases generated by the spectra of Sturm-Liouville problems
Electronic Journal of Differential Equations, 2013 Let ${lambda _n^2} _{n = 0}^infty$ be the spectra of a Sturm-Liouville problem on $[0,pi ]$. We investigate the question: Do the systems ${ cos(lambda_nx)} _{n = 0}^infty$ or ${ sin(lambda_n x)} _{n = 0}^infty$ form Riesz bases in ${L^2}[0,pi ]$? The
Tigran Harutyunyan +2 more
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On the relation of the frame-related operators of fusion frame systems. [PDF]
Sampl Theory Signal Process Data Anal, 2023 Köhldorfer L, Balazs P.
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1D nonnegative Schrodinger operators with point interactions [PDF]
Математичні Студії, 2013 Let $Y$ be an infinite discrete set of points in $dR$,satisfying the condition $inf{|y-y'|,; y,y'in Y, y'ey}>0.$ In the paper we prove that the systems${delta(x-y)}_{yin Y}, ;{delta'(x-y)}_{yin Y},{delta(x-y),;delta'(x-y)}_{yin Y}$ {form Riesz} bases in ...
Yu. G. Kovalev
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FUNCTIONAL SUFFICIENT DIMENSION REDUCTION THROUGH AVERAGE FRÉCHET DERIVATIVES. [PDF]
Ann Stat, 2022 Lee KY, Li L.
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Localization of Fréchet Frames and Expansion of Generalized Functions. [PDF]
Bull Malays Math Sci Soc, 2021 Pilipović S, Stoeva DT.
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The motion planning problem and exponential stabilization of a heavy chain. Part II [PDF]
Opuscula Mathematica, 2008 This is the second part of paper [P. Grabowski, The motion planning problem and exponential stabilization of a heavy chain. Part I, to appear in International Journal of Control], where a model of a heavy chain system with a punctual load (tip mass) in ...
Piotr Grabowski
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Unions of exponential Riesz bases
AIMS Mathematics<p>We have developed new methods for constructing exponential Riesz bases by combining existing ones. These methods involve taking unions of frequency sets and domains respectively, offering easier construction compared to known techniques. Along with examples illustrating our methods, we also provide several examples that highlight the intricate
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Wavelet Riesz bases associated to nonisotropic dilations
, 2015 14 pages, 3 ...
Führ, Hartmut, Maus, Yannic
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