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Titlebook: Analysis and Operator Theory; Dedicated in Memory Themistocles M. Rassias,Valentin A. Zagrebnov Book 2019 Springer Nature Switzerland AG 2

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On the Border Lines Between the Regions of Distinct Solution Type for Solutions of the Friedmann Eqquation by two smooth function branches, expressing the cosmological constant as unique functions of the matter and radiation density (which is considered as a parameter). These functions satisfy simple asymptotic relations with respect to the matter density. They are constructed as the solutions of the equation ..
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1931-6828 ysis and operator theory.Highlights Tosio Kato‘s impact to a.Dedicated to Tosio Kato’s 100th birthday, this book contains research and survey papers on a broad spectrum of methods, theories, and problems in mathematics and mathematical physics. Survey papers and in-depth technical papers emphasize l
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Peter Filzmoser,Alexandra Mazak-Huemerccretivity, compactness of the resolvent, and maximal inequalities. Motivated by recent works with X. Pan, Y. Almog, and D. Grebenkov, we actually improve the known results in the case with purely imaginary potential.
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Karlheinz Brandenburg,Christoph Sladeczekion operator .(., .) of the evolution equation can be approximated in the operator norm by a combination of semigroups generated by . and .(.) provided the condition . is satisfied. The convergence rate for the approximation is given by the Hölder exponent .. The result is proved using the evolution semigroup approach.
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Thomas Schuster,Lukas Waidelich,Raphael Volzhat the exact solution for the differential operator with conventional boundary conditions is known. We apply this perturbation method to solve partial integro-differential, or loaded differential, equations with nonlocal, or integral, boundary conditions.
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