Joachim Hilgert (1989)
Annales de l'institut Fourier
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Analytic extensions of the metaplectic representation by integral operators of Gaussian type have been calculated in the and the Bargmann-Fock realisations by Howe [How2] and Brunet-Kramer [Brunet-Kramer, Reports on Math. Phys., 17 (1980), 205-215]], respectively. In this paper we show that the resulting semigroups of operators are isomorphic and calculate the intertwining operator.
G. Da Prato, E. Sinestrari (1987)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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Stefan Vajda (1985)
Trabajos de Estadística e Investigación Operativa
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Concepts of linear programming are used in a discrete renewal model for the development of a graded population, when the transfer rates between the various grades are given and the 'wastage' is replaced by new entrants. The following questions are considered. Which structures can be attained from a given structure, after one or two steps? Which structures can be re-attained after one or two steps? Attention is paid to the possibility of alternative routes, and it is observed...
Abdelaziz Rhandi (1997)
Studia Mathematica
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Using extrapolation spaces introduced by Da Prato-Grisvard and Nagel we prove a non-autonomous perturbation theorem for Hille-Yosida operators. The abstract result is applied to non-autonomous retarded partial differential equations.
Benegas, Julio, Ripoll, Daniel R., Marchi, Ezio (1980)
Portugaliae mathematica
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François Hamel (1997)
Annales de l'I.H.P. Analyse non linéaire
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Joao-Paulo Dias, Mário Figueira (1991)
Revista Matemática de la Universidad Complutense de Madrid
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In this paper we prove the existence of a weak solution for a given semilinear singular real hyperbolic system.
(1993)
Compositio Mathematica
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