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.
On the Stokes equation with Neumann boundary condition
In this paper, we study the nonstationary Stokes equation with Neumann boundary condition in a bounded or an exterior domain in ℝⁿ, which is the linearized model problem of the free boundary value problem. Mainly, we prove estimates for the semigroup of the Stokes operator. Comparing with the non-slip boundary condition case, we have the better decay estimate for the gradient of the semigroup in the exterior domain case because of the null force at the boundary.
On the structure of commuting isometries
On the structure of subordinate semigroups.
On the Sz.-Nagy boundedness condition on abelian involution semigroups
On the topology induced by the adjoint of a semigroup of operators.
On the Wold-type decomposition of a pair of commuting isometries
On the Yosida approximation and the Widder-Arendt representation theorem
The Yosida approximation is treated as an inversion formula for the Laplace transform.
On Two Classes of Mappings on Banach Sequenee Spaces.
On two reverse inequalities in the Segal-Bargmann space.
On unrestricted products of (W) contractions
Given a family of (W) contractions on a reflexive Banach space X we discuss unrestricted sequences . We show that they converge weakly to a common fixed point, which depends only on x and not on the order of the operators if and only if the weak operator closed semigroups generated by are right amenable.
One-parameter semigroups of operators on Lc-embedded spaces.
One-parameter submonoids in locally complete differentiable monoids
Opérateurs de Schrödinger avec potentiel singuliér magnétique, dans un ouvert arbitraire de
Opérateurs dissipatifs et codissipatifs invariants par translations sur les groupes localement compacts
Opérateurs dissipatifs et semi-groupes dans les espaces de fonctions continues
Soit un espace localement compact. Tout opérateur dissipatif de domaine dense dans est limite d’opérateurs dissipatifs bornés. Ce résultat permet, dans le cas où est un espace homogène, de démontrer que tout opérateur dissipatif, de domaine dense et invariant sur se prolonge en le générateur infinitésimal d’un semi-groupe à contraction invariant sur .À tout opérateur vérifiant le principe du maximum positif sur et de domaine assez riche, on associe un opérateur bilinéaire , appelé...