Rendiconti dell'Istituto di Matematica dell'Università di Trieste: an International Journal of Mathematics vol.28 (1996) s.

CONTENTS

George Avalos, Irena Lasiecka
Exponential stability of a thermoelastic system without mechanical dissipation

Viorel Barbu, Angelo Favini
Periodic problems for degenerate differential equations

Viorel Barbu, Mimmo Iannelli
The semigroup approach to non-linear age-structured equations

Bernard Beauzamy
Extremal products in Bombieri's norm

Shangquan Bu, Sylvie Guerre-Delabriere
Imaginary powers and Interpolation spaces of unbounded operators

Giuseppe Da Prato
Perturbation of Ornstein-Uhlenbeck semigroups

H. O. Fattorini
Nonlinear infinite dimensional optimal control problems with state constraints and unbounded control sets

Marco Fuhrman
On the sum of generators of analytic semigroups

Ugo Gianazza, Vincenzo Vespri
Analytic semigroups generated by square Hörmander Operators

Hans-Christoph Grunau, Wolf Von Wahl
Regularity considerations for semilinear parabolic systems

Matthias Hieber
Gaussian estimates and invariance of the Lp-Spectrum for elliptic operators of higher order

Alessandra Lunardi, Vincenzo Vespri
Generation of strongly continous semigroups by elliptic operators with unbounded coefficients in Lp(Rn)

J. M. A. M. Van Neerven
Elementary operator-theoretic proof of Wienner's Tauberian Theorem

Jan Prüss
Poisson estimates and maximal regularity for evolutionary integral equations in Lp-spaces

Eugenio Sinestrari
Favard classes and hyperbolic equations

Pavel E. Sobolevskii
Well-Posedness of difference elliptic equation

Guido Sweers
Hopf's Lemma and two dimensional domains with corners

Horst R. Thieme
On commutative sums of generators

Roberto Triggiani
Carleman estimates and exact boundary controllabilty for a system of coupled non-conservative Schödinger Equations

Details

Editorial policy The journal Rendiconti dell’Istituto di Matematica dell’università di Trieste publishes original articles in all areas of mathematics. Special regard is given to research papers, but attractive expository papers may also be considered for publication. The journal usually appears in one issue per year. Additional issues may however be published. In particular, the Managing Editors may consider the publication of supplementary volumes related to some special events, like conferences, workshops, and advanced schools. All submitted papers will be refereed. Manuscripts are accepted for review with the understanding that the work has not been published before and is not under consideration for publication elsewhere. Our journal can be obtained by exchange agreements with other similar journals.

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Recent Submissions

Now showing 1 - 5 of 19
  • Publication
    Elementary operator-theoretic proof of Wienner's Tauberian Theorem
    (Università degli Studi di Trieste. Dipartimento di Scienze Matematiche, 1996)
    Van Neerven, J. M. A. M.
    We present a short and elementary proof of Wiener's general Tauberian theorem based on the theory of one-parameter groups of operators.
      1098  341
  • Publication
    Carleman estimates and exact boundary controllabilty for a system of coupled non-conservative Schödinger Equations
    (Università degli Studi di Trieste. Dipartimento di Scienze Matematiche, 1996)
    Triggiani, Roberto
    We consider a system of 2 (or more) coupled Schródinger equations in the difficult situation where the equations have first-order, lower-order terms, as well as first-order coupling in all space variables. By using a general differential multiplier we give a `friendly’ proof of earleman estimates. Under more restrictive intrinsic conditions mostly on the coupling operators, we obtain eaact controllability results for the coupled system, under various combinations of boundary controls: Dirichlet/Dirichlet; Dirichlet/Neumann; Neumann/Neumann. The controls are active on a suitable portion of the boundary. These results cannot be obtained by standard multipliers.
      1200  682
  • Publication
    On commutative sums of generators
    (Università degli Studi di Trieste. Dipartimento di Scienze Matematiche, 1996)
    Thieme, Horst R.
    The theorem by Da Prato and Grisvard on resolvent commutative sums of linear m-dissipatine operators is recast and extended in the framework of integrated semigroups.
      803  505
  • Publication
    Hopf's Lemma and two dimensional domains with corners
    (Università degli Studi di Trieste. Dipartimento di Scienze Matematiche, 1996)
    Sweers, Guido
      985  390
  • Publication
    Well-Posedness of difference elliptic equation
    (Università degli Studi di Trieste. Dipartimento di Scienze Matematiche, 1996)
    Sobolevskii, Pavel E.
    It is considered the difference analog of Poisson equation on the plane and it is established the exact with respect of step h coercive inequality in the $C^h$-norm for its solutions.
      852  516