Results 61 to 70 of about 455 (108)

Quasi-Fredholm, Saphar Spectra for Integrated Semigroup [PDF]

arXiv, 2018
In this paper, we show a spectral inclusion of integrated semigroups for Saphar, essentially Saphar and quasi-Fredholm spectra.
arxiv  

Random homomorphisms and random derivations in random normed algebras via fixed point method

, 2012
Using the fixed point method, we prove the Hyers-Ulam stability of the Cauchy additive functional inequality and of the Cauchy-Jensen additive functional inequality in random normed spaces.MSC:47H10, 39B52, 37H10, 60H25, 17B40, 39B72, 47B47, 54E70.
Choonkill Park, M. Eshaghi Gordji, R. Saadati   +2 more
semanticscholar   +1 more source

A posteriori analysis of the spectral element discretization of heat equation

Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
In this paper, we present a posteriori analysis of the discretization of the heat equation by spectral element method. We apply Euler’s implicit scheme in time and spectral method in space.
Chorfi Nejmeddine, Abdelwahed Mohamed, Ben Omrane Ines   +2 more
doaj   +1 more source

Approximate *-derivations and approximate quadratic *-derivations on C*-algebras

, 2011
In this paper, we prove the stability of *-derivations and of quadratic *-derivations on Banach *-algebras. We moreover prove the superstability of *-derivations and of quadratic *-derivations on C*-algebras.2000 Mathematics Subject Classification: 39B52;
S. Jang, Choonkill Park
semanticscholar   +1 more source

Commutators of multilinear fractional maximal operators with Lipschitz functions on Morrey spaces

Open Mathematics
In this work, we present necessary and sufficient conditions for the boundedness of the commutators generated by multilinear fractional maximal operators on the products of Morrey spaces when the symbol belongs to Lipschitz spaces.
Zhang Pu, Ağcayazı Müjdat
doaj   +1 more source

Derivations on triangular Banach algebras of order three [PDF]

arXiv, 2013
In this paper, we define some new notions of triangular Banach algebras and we investigate the derivations on these algebras.
arxiv  

Derivable maps and generalized derivations

, 2014
Let A be a unital algebra, M be an A -bimodule, L(A ,M ) be the set of all linear maps from A to M , and RA be a relation on A . A map δ ∈ L(A ,M ) is called derivable on RA if δ (AB) = δ (A)B+Aδ (B) for all (A,B)∈RA .
Z. Pan
semanticscholar   +1 more source

Some estimates for the norm of the self-commutator [PDF]

arXiv, 2014
Different estimates for the norm of the self-commutator of a Hilbert space operator are proposed. Particularly, this norm is bounded from above by twice of the area of the numerical range of the operator. An isoperimetric-type inequality is proved.
arxiv  

All-derivable subsets for nest algebras on Banach spaces

, 2014
Let N be a nest on a complex Banach space X and let AlgN be the associated nest algebra. We say that a subset S ⊂ AlgN is an all-derivable subset of AlgN if every linear map δ from AlgN into itself derivable on S (i.e. δ satisfies that, for each Z ∈ S, δ(
Yanfang Zhang, J. Hou, X. Qi
semanticscholar   +1 more source

Jordan left derivations and some left derivable maps

, 2010
Let A be an algebra and M be a left A -module. We say that a linear mapping φ : A → M is a left derivable mapping at P if φ(ST ) = Sφ(T ) +Tφ(S) for any S,T ∈ A with ST = P .
Jiankui Li, Jiren Zhou
semanticscholar   +1 more source