Fermeture des opérateurs dissipatifs invariants.
Finite propagation speed and kernels of strictly elliptic operators.
Finite rank, relatively bounded perturbations of semigroups generators
Fonctionnelles multiplicatives opératrices
Fonctions cosinus hilbertiennes bornées dans les groupes commutatifs localement compacts
Formulae for joint spectral radii of sets of operators
The formula is proved for precompact sets M of weakly compact operators on a Banach space. Here ϱ(M) is the joint spectral radius (the Rota-Strang radius), is the Hausdorff spectral radius (connected with the Hausdorff measure of noncompactness) and r(M) is the Berger-Wang radius.
Fractional powers of closed operators
Functional calculus for generators of uniformly bounded holomorphic semigroups.
Functional equations of delay type in spaces
Functional homomorphisms and dynamical systems.
Fundamental decay mode and asymptotic behaviour of positive semigroups
Funktionalkalküle für abgeschlossene lineare Operatoren in Banachräumen.
Generation of analytic semigroups by elliptic operators of second order in Hölder spaces
Generation of analytic semi-groups in L2 for a class of second order degenerate elliptic operators
Generators for quasi-free completely positive semi-groups
Global Existence and Boundedness of Solutions to a Model of Chemotaxis
A model of chemotaxis is analyzed that prevents blow-up of solutions. The model consists of a system of nonlinear partial differential equations for the spatial population density of a species and the spatial concentration of a chemoattractant in n-dimensional space. We prove the existence of solutions, which exist globally, and are L∞-bounded on finite time intervals. The hypotheses require nonlocal conditions on the species-induced production of the chemoattractant.
Global existence and nonexistence for semiliniear parabolic systems with nonlinear boundary conditions.
Global existence for a Riccati equation arising in a boundary control problem for distributed parameters
Si prova resistenza globale della soluzione di una equazione di Riccati collegata alla sintesi di un problema di controllo ottimale. Il problema considerato rappresenta la versione astratta di alcuni problemi governati da equazioni paraboliche con il controllo sulla frontiera.
Groups of Isometries on Certain Ideals of Hubert Space Operators.
Gruppen und Halbgruppen verallgemeinerter Skalaroperatoren.