On the Gelfand-Hille theorems
On the growth of analytic semigroups along vertical lines
We construct two Banach algebras, one which contains analytic semigroups such that arbitrarily slowly as , the other which contains ones such that arbitrarily fast
On the hypercontractivity property.
On the invertibility of isometric semigroup representations
Let T be a representation of a suitable abelian semigroup S by isometries on a Banach space. We study the spectral conditions which will imply that T(s) is invertible for each s in S. On the way we analyse the relationship between the spectrum of T, Sp(T,S), and its unitary spectrum . For or , we establish connections with polynomial convexity.
On the local ergodic theorems of Krengel, Kubokawa, and Terrell
On the modulus of one-parameter semigroups.
On the Perturbation Theory for Strongly Continuous Semigroups.
On the potential operators associated with a semigroup
On the quadratic optimal control problem for Volterra integro-differential equations
On the scattering theory for quantum dynamical semigroups
On the semigroup of mappings on Fréchet Montel space
On the Semigroup of the Stokes Operator for Exterior Domains in Lq-Spaces.
On the semigroups of age-size dependent population dynamcis with spatial diffusion.
On the Sharpness of Non-Optimal Approximation for Semigroup Operators.
On the solutions of the inhomogeneous evolution equation in Banach spaces
Vengono dati nuovi teoremi di regolarità per le soluzioni dell'equazione nel caso in cui è il generatore infinitesimale di un semigruppo analitico in uno spazio di Banach e è una funzione continua.
On the Spectra of Certain Semi-Groups.
On the spectrum of a one-parameter strongly continous representation.
On the spectrum of the analytic generator.
On the stability of strongly continuous semigroups of positive operators on
On the Stepanov almost periodic solution of a second-order infinitesimal generator differential equation.