A commuting d-tuple T=(T_1,...,T_d) of bounded linear operators on a Hilbert space H is
called a spherical m-isometry if ∑_j=0^m(-1)^jmjQ_T^j(I)=0, where I denotes the identity …

We give a complete characterization of supercylicity for abelian semigroups of matrices on
Rn, n⩾ 1. We solve the problem of determining the minimal number of matrices over R which …

In this paper, we study subspace diskcyclic and subspace-disk transitive tuples of operators.
We give some characterizations of these tuples. Also, we give a set of sufficient conditions …

Abstract Let $ p {\geq} 1$ be a real number. A tuple $ T=(T_1,{\ldots}, T_n) $ of commuting
bounded linear operators on a Banach space X is called an ${\ell}^ p $-spherical isometry if …

On the Supercyclicity Criterion for a Pair of Operators Page 1 On the Supercyclicity Criterion for
a Pair of Operators Javad Izadi∗ Faculty of Mathematical Sciences, University of Payame …

Let p≥ 1 be a real number. A tuple T=(T1,..., Tn) of commuting bounded linear operators on
a Banach space X is called an lp-spherical isometry if∑ ni= 1 Tixp= xp for all x∈ X. The …