Search Results - "Jorgensen, Palle"
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Harmonic Analysis Invariants for Infinite Graphs Via Operators and Algorithms
Published in The Journal of fourier analysis and applications (01-04-2021)“…We present recent advances in harmonic analysis on infinite graphs. Our approach combines combinatorial tools with new results from the theory of unbounded…”
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mu-Brownian Motion, Dualities, Diffusions, Transforms, and Reproducing Kernel Hilbert Spaces
Published in Journal of theoretical probability (2022)“…Replacing the Lebesgue measure on an interval by a Stieltjes positive non-atomic measure, we study the corresponding counterpart of the Brownian motion. We…”
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Higher Order Difference Operators and Associated Relative Reproducing Kernel Hilbert Spaces
Published in Numerical functional analysis and optimization (26-10-2023)“…We study multiple notions of Hilbert spaces of functions which, via the respective inner products, reproduce function values, or differences of function…”
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Free Probability on the Limit C∗-Algebra Induced by a Chain of Graphs
Published in Complex analysis and operator theory (2024)“…In this paper, we consider the limit C ∗ -algebra induced by a chain of connected finite directed graphs, and study the free probability on it. In particular,…”
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New Hilbert Space Tools for Analysis of Graph Laplacians and Markov Processes
Published in Complex analysis and operator theory (01-10-2023)“…The main objective of this paper is to develop the concepts and ideas used in the theory of weighted networks on infinite graphs. Our basic ingredients are a…”
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Einstein field equations extended to fractal manifolds: A fractal perspective
Published in Journal of geometry and physics (01-02-2024)Get full text
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Representation theory and multilevel filters
Published in Journal of applied mathematics & computing (01-04-2023)“…We present a general setting where wavelet filters and multiresolution decompositions can be defined, beyond the classical L 2 ( R , d x ) setting. This is…”
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Measurable multiresolution systems, endomorphisms, and representations of Cuntz relations
Published in Quantum Studies : Mathematics and Foundations (01-04-2024)“…The purpose of this paper is to present new classes of function systems as part of multiresolution analyses. Our approach is representation theoretic, and it…”
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Finitely additive functions in measure theory and applications
Published in Rocznik Akademii Górniczo-Hutniczej im. Stanisława Staszica. Opuscula Mathematica (01-01-2024)“…In this paper, we consider, and make precise, a certain extension of the Radon-Nikodym derivative operator, to functions which are additive, but not…”
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Substitution-dynamics and invariant measures for infinite alphabet-path space
Published in Advances in applied mathematics (01-05-2024)“…We study substitutions on a countably infinite alphabet (without compactification) as Borel dynamical systems. We construct stationary and non-stationary…”
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About Sobolev spaces on fractals: fractal gradians and Laplacians
Published in Aequationes mathematicae (16-04-2024)Get full text
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Monic representations of the Cuntz algebra and Markov measures
Published in Journal of functional analysis (15-08-2014)“…We study representations of the Cuntz algebras ON. While, for fixed N, the set of equivalence classes of representations of ON is known not to have a Borel…”
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Fourier frequencies in affine iterated function systems
Published in Journal of functional analysis (01-06-2007)“…We examine two questions regarding Fourier frequencies for a class of iterated function systems (IFS). These are iteration limits arising from a fixed finite…”
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Positive matrices in the Hardy space with prescribed boundary representations via the Kaczmarz algorithm
Published in Journal d'analyse mathématique (Jerusalem) (01-07-2019)“…For a singular probability measure μ on the circle, we show the existence of positive matrices on the unit disc which admit a boundary representation on the…”
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An Index for Graphs and Graph Groupoids
Published in Axioms (01-02-2022)“…In this paper, we consider certain quantities that arise in the images of the so-called graph-tree indexes of graph groupoids. In text, the graph groupoids are…”
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Monopoles, Dipoles, and Harmonic Functions on Bratteli Diagrams
Published in Acta applicandae mathematicae (01-02-2019)“…In our study of electrical networks we develop two themes: finding explicit formulas for special classes of functions defined on the vertices of a transient…”
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New characterizations of reproducing kernel Hilbert spaces and applications to metric geometry
Published in Rocznik Akademii Górniczo-Hutniczej im. Stanisława Staszica. Opuscula Mathematica (01-01-2021)“…We give two new global and algorithmic constructions of the reproducing kernel Hilbert space associated to a positive definite kernel. We further present a…”
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Power series solution for fractal differential equations
Published in Bollettino della Unione matematica italiana (2008) (12-08-2024)Get full text
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Analysis of orthogonality and of orbits in affine iterated function systems
Published in Mathematische Zeitschrift (01-08-2007)“…We introduce a duality for affine iterated function systems (AIFS) which is naturally motivated by group duality in the context of traditional harmonic…”
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Non-standard analysis for fractal calculus
Published in The Journal of Analysis (01-09-2023)Get full text
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