Results 11 to 20 of about 1,568,578 (301)

Computable operators on regular sets

open access: yesMathematical Logic Quarterly, 2004
AbstractFor regular sets in Euclidean space, previous work has identified twelve ‘basic’ computability notions to (pairs of) which many previous notions considered in literature were shown to be equivalent. With respect to those basic notions we now investigate on the computability of natural operations on regular sets: union, intersection, complement,
Martin Ziegler
openaire   +2 more sources

A remark on regular operators

open access: yesRocky Mountain Journal of Mathematics, 1989
A simple definition of regular Mikusiiiski operators is given and equivalence with the original one is proved. Regular operators were introduced and studied by T.K. Boehme in [2]. Regular operators form a subalgebra of Mikusiiiski operators and have local properties. For example each regular operator has a welldefined support.
Mikusinski, Piotr
openaire   +3 more sources

The Order Continuity of the Regular Norm on Regular Operator Spaces [PDF]

open access: yesAbstract and Applied Analysis, 2013
We present here some sufficient conditions for the regular norm on to be order continuous, and for () to be a KB-space. In particular we deduce a characterization of the order continuity of the regular norm using L- and M-weak compactness of regular ...
Zi Li Chen, Ying Feng, Jin Xi Chen
doaj   +4 more sources

Power-regular Bishop operators and spectral decompositions [PDF]

open access: yes, 2021
It is proved that a wide class of Bishop-type operators $T_{\phi,\tau}$ are power-regular operators in $L^p(\Omega, \mu)$, $1 \leq p < \infty$, computing the exact value of the local spectral radius at any function $u \in L^p(\Omega, \mu)$.
Gallardo Gutiérrez, Eva Antonia   +1 more
core   +1 more source

Nijenhuis geometry III: gl-regular Nijenhuis operators

open access: yes, 2023
We study Nijenhuis operators, that is, (1,1)-tensors with vanishing Nijenhuis torsion under the additional assumption that they are gl-regular, i.e., every eigenvalue has geometric multiplicity one.
Vladimir S Matveev (8324970)   +2 more
core   +3 more sources

Regular and completely regular differential operators [PDF]

open access: yesMathematical Notes, 2007
We define the concept of completely regular ordinary differential operators and give various criteria for operators to belong to this class. We give also criteria for Birkhof regularity of ordinary differential operators in terms of the growth of the Green function and basis property.
Shiryaev, E. A., Shkalikov, A. A.
openaire   +2 more sources

Nijnehuis Geometry III: gl-regular Nijenhuis operators [PDF]

open access: yes, 2020
We study Nijenhuis operators, that is, (1,1)-tensors with vanishing Nijenhuis torsion under the additional assumption that they are gl-regular, i.e., every eigenvalue has geometric multiplicity one.
Andrey Konyaev (8954018)   +2 more
core   +3 more sources

Regular Operator Equations: Conditions for Regularity [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
Regular operator equations are causal equations admitting unique solutions and have the property that all of their limiting equations along solutions admit unique solutions. Sufficient conditions which guarantee that an operator equation
openaire   +2 more sources

Regular multilinear operators on C(K) spaces [PDF]

open access: yes, 1999
The purpose of this paper is to characterise the class of regular continuous multilinear operators on a product of C(K) spaces, with values in an arbitrary Banach space.
Bombal Gordon, Fernando   +1 more
core   +1 more source

About Riesz theory of compact operators

open access: yesBibechana, 2012
In this paper, it is shown that every compact operators are bounded and continuous. The bounded and continuous properties of an operator is sufficient for a Riesz operator.
Nagendra Pd Sah
doaj   +3 more sources

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