Addendum to the paper: “Some fixed point theorems for multivalued mappings”
Additive and superadditive local theorems
Additive combinations of special operators
This is a survey paper on additive combinations of certain special-type operators on a Hilbert space. We consider (finite) linear combinations, sums, convex combinations and/or averages of operators from the classes of diagonal operators, unitary operators, isometries, projections, symmetries, idempotents, square-zero operators, nilpotent operators, quasinilpotent operators, involutions, commutators, self-commutators, norm-attaining operators, numerical-radius-attaining operators, irreducible operators...
Additivity of maps on triangular algebras.
Addresses
Adjoining inverses to noncommutative Banach algebras and extensions of operators
Adjoint and self-adjoint differential operators on graphs.
Adjoint bi-continuous semigroups and semigroups on the space of measures
For a given bi-continuous semigroup on a Banach space we define its adjoint on an appropriate closed subspace of the norm dual . Under some abstract conditions this adjoint semigroup is again bi-continuous with respect to the weak topology . We give the following application: For a Polish space we consider operator semigroups on the space of bounded, continuous functions (endowed with the compact-open topology) and on the space of bounded Baire measures (endowed with the weak-topology)....
Adjoint characterisations of unbounded weakly compact, weakly completely continuous and unconditionally converging operators
Characterisations are obtained for the following classes of unbounded linear operators between normed spaces: weakly compact, weakly completely continuous, and unconditionally converging operators. Examples of closed unbounded operators belonging to these classes are exhibited. A sufficient condition is obtained for the weak compactness of T' to imply that of T.
Adjoint domains and generalized splines
Adjointability of operators on Hilbert -modules.
Adjoints of composition operators on standard Bergman and Dirichlet spaces on the unit disk.
Adjoints of elliptic boundary value problems
Adjoints of solution semigroups and identifiability of delay differential equations in Hilbert spaces.
Adjungiertenbildungen in der Operatortheorie.
Admissibilité de l'observation pour des systèmes bilinéaires contrôlés par des opérateurs non bornés
Admissible and regular potentials for positive Co-semigroups and application to heat semigroups.
Admissible initial operators for superpositions of right invertible operators
Admissible maps, intersection results, coincidence theorems
We obtain generalizations of the Fan's matching theorem for an open (or closed) covering related to an admissible map. Each of these is restated as a KKM theorem. Finally, applications concerning coincidence theorems and section results are given.
Affine Flows and Distal Points.