Common fixed points of biased maps of type and applications.
Common fixed points of Greguš type multi-valued mappings
This work is considered as a continuation of [19,20,24]. The concepts of -compatibility and sub-compatibility of Li-Shan [19, 20] between a set-valued mapping and a single-valued mapping are used to establish some common fixed point theorems of Greguš type under a -type contraction on convex metric spaces. Extensions of known results, especially theorems by Fisher and Sessa [11] (Theorem B below) and Jungck [16] are thereby obtained. An example is given to support our extension.
Common fixed points of mappings and set-valued mappings in symmetric spaces with application to probabilistic spaces.
Common fixed points of multistep Noor iterations with errors for a finite family of generalized asymptotically quasi-nonexpansive mappings.
Common fixed points of one-parameter nonexpansive semigroups in strictly convex Banach spaces.
Common fixed points of set-valued mappings.
Common fixed points of weakly contractive and strongly expansive mappings in topological spaces.
Common fixed points under contractive conditions in symmetric spaces.
Common fixed points versus invariant approximation in nonconvex sets.
Common fixed points via weakly biased Greguš type mappings.
Common fixed-point problem for a family multivalued mapping in Banach space.
Common fuzzy hybrid fixed point theorems for a sequence of fuzzy mappings.
Common hypercyclic entire functions for multiples of differential operators
Common multiples of operator polynomials with analytic coefficients.
Common random fixed points of compatible random operators.
Common solutions of an iterative scheme for variational inclusions, equilibrium problems, and fixed point problems.
Commutant of multiplication operators in weighted Bergman spaces on polydisk
We study a certain operator of multiplication by monomials in the weighted Bergman space both in the unit disk of the complex plane and in the polydisk of the -dimensional complex plane. Characterization of the commutant of such operators is given.
Commutants and derivation ranges
In this paper we obtain some results concerning the set , where is the closure in the norm topology of the range of the inner derivation defined by Here stands for a Hilbert space and we prove that every compact operator in is quasinilpotent if is dominant, where is the closure of the range of in the weak topology.
Commutants of certain multiplication operators on Hilbert spaces of analytic functions
This paper characterizes the commutant of certain multiplication operators on Hilbert spaces of analytic functions. Let be the operator of multiplication by z on the underlying Hilbert space. We give sufficient conditions for an operator essentially commuting with A and commuting with for some n>1 to be the operator of multiplication by an analytic symbol. This extends a result of Shields and Wallen.
Commutants of Nest Algebras Modulo the Compact Operators.