Generalising the definition to commuting d-tuples of operators, a number of authors have
considered structural properties of m-isometric, n-symmetric and (m, n)-isosymmetric …

The purpose of the paper is to introduce and study a class of multivariable operators on semi-
Hilbertian spaces, ie spaces generated by positive semidefinite sesquilinear forms. Let T=(T …

In this paper, we introduce the class of (A;(m, n))-isosymmetric operators and we study some
of their properties, for a positive semi-definite operator A and m, n ∈ N m, n∈ N, which …

Class of operators related to a $(m,C)$ -isometric tuple of commuting operators | SpringerLink
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In this paper, We introduce a new class of multivariable operators known as joint m-
quasihyponormal tuple of operators. It is a naturel extension of joint normal and joint …

In this paper, we consider a generalization of (A, m, n)-isosymmetric operators on a Hilbert
space to the multivariable setting. For a d-tuple of commuting operators T=(T1,..., Td), A a …

For some operator A∈ B (H), positive integers m and k, an operator T∈ B (H) is called k-
quasi-(A, m)-symmetric if T* k (mP j= 0 (− 1) j (mj) T* m− jATj) Tk= 0, which is a …

Joint n-normality of linear transformations Page 1 J. Math. Computer Sci., 25 (2022), 361–369
Online: ISSN 2008-949X Journal Homepage: www.isr-publications.com/jmcs Joint n-normality …

The purpose of this paper is to introduce and study the structure of p-tuple of (n, m)-D-normal
operators. This is a generalization of the class of p-tuple of n-normal operators. We consider …

We consider an extension of the concept of (α, β)‐normal operators in single variable
operator to tuples of operators, similar to those extensions of the concepts of normality to …