H
Hans Volkmer
Researcher at University of Wisconsin–Milwaukee
Publications - 148
Citations - 1352
Hans Volkmer is an academic researcher from University of Wisconsin–Milwaukee. The author has contributed to research in topics: Eigenvalues and eigenvectors & Sturm–Liouville theory. The author has an hindex of 18, co-authored 141 publications receiving 1240 citations. Previous affiliations of Hans Volkmer include University of Wisconsin System & University of Wisconsin-Madison.
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Multiparameter eigenvalue problems and expansion theorems
TL;DR: Multiparameter eigenvalue problems for hermitian matrices and bounded operators for unbounded operators were studied in this article, where the authors showed that the expansion theorems for bounded operators can be extended to bounded operators.
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Eigencurves for two-parameter Sturm-Liouville equations
Paul Binding,Hans Volkmer +1 more
TL;DR: Motivation for the topic, elementary properties of eigencurves, illustrations on a simple example first studied by Richardson in 1918, and some natural questions which may whet the reader's appetite are given.
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Riesz bases of solutions of Sturm-Liouville equations
Xionghui He,Hans Volkmer +1 more
TL;DR: In this paper, the stability of orthogonal bases of solutions of Sturm-Liouville equations with different types of initial conditions was investigated based on Riesz bases of cosines and sines in the Hibert space.
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On the Gibbs Phenomenon for Wavelet Expansions
Hong-Tae Shim,Hans Volkmer +1 more
TL;DR: In this paper, it was shown that a Gibbs phenomenon occurs in the wavelet expansion of a function with a jump discontinuity at 0 for a wide class of wavelets, and the asymptotic behavior of the Gibbs splines was analyzed.
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Sturm–Liouville problems with indefinite weights and Everitt's inequality
TL;DR: In this article, it was shown that spectral properties of Sturm-Liouville eigenvalue problems with indefinite weights are related to integral inequalities studied by Everitt, and a Baire category argument was used to show that the inequality under consideration does not hold.