Continuability and estimates of solutions of (a(t)ψ(x)x')' + c(t)f(x) = 0
Vadim Komkov (1974)
Annales Polonici Mathematici
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Vadim Komkov (1974)
Annales Polonici Mathematici
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Chun-Yen Shen (2008)
Acta Arithmetica
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H. S. Gopalakrishna, V. S. Shetiya (1977)
Annales Polonici Mathematici
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Peter D. Hislop, Shu Nakamura (1989)
Annales de l'I.H.P. Physique théorique
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Ivan, Mircea (1998)
General Mathematics
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Erik Skibsted (1990)
Journées équations aux dérivées partielles
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Izobov, N.A., Batan, S.N. (1997)
Memoirs on Differential Equations and Mathematical Physics
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Cristinel Mortici, H. M. Srivastava (2014)
Colloquium Mathematicae
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The aim of this article is to give new refinements and sharpenings of Shafer's inequality involving the arctangent function. These are obtained by means of a change of variables, which makes the computations much easier than the classical approach.
Zbigniew Błocki (2004)
Annales Polonici Mathematici
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We give upper and lower bounds for constants appearing in the L²-estimates for the ∂̅-operator due to Donnelly-Fefferman and Berndtsson.
Zdeněk Vorel (1960)
Časopis pro pěstování matematiky
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Daniel Tataru (1999)
Journées équations aux dérivées partielles
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The aim of this work is threefold. First we set up a calculus for partial differential operators with nonsmooth coefficients which is based on the FBI (Fourier-Bros-Iagolnitzer) transform. Then, using this calculus, we prove a weaker version of the Strichartz estimates for second order hyperbolic equations with nonsmooth coefficients. Finally, we apply these new Strichartz estimates to second order nonlinear hyperbolic equations and improve the local theory, i.e. prove local well-posedness...