Matrices and matrix operations are studied and applied in many areas such as engineering,
natural and social sciences. Books written on these topics include Berman et al.(1989) …

This paper is concerned with a long list of matrix products for partitioned and non-partitioned
matrices, including Kronecker, Khatri–Rao of first kind, Hadamard, Tracy–Singh, Khatri–Rao …

The weighted least-squares solutions of coupled singular matrix equations are too difficult to
obtain by applying matrices decomposition. In this paper, a family of algorithms are applied …

This paper extends some results for the weighted Moore–Penrose inverse AM, N+ in Hilbert
space to the so-called weighted Minkowski inverse AM, N⊕ of an arbitrary rectangular …

We introduce the notion of Khatri‐Rao product for operator matrices acting on the direct sum
of Hilbert spaces. This notion generalizes the tensor product and Hadamard product of …

In this paper, we generalize the time-varying descriptor systems to the case of fractional
order in matrix forms. Moreover, we present the general exact solutions of the linear singular …

After receiving a report from a reader, the Editor-in-Chief consulted a third party expert and
an Associate Editor of the journal. The response from the author has been considered …

The aim of this article is to present fractional versions of the Hadamard type inequalities for
exponentially (s, m)-convex functions via k-analogue of Riemann-Liouville fractional …

We generalize the notions of Khatri-Rao sums for matrices and tensor sums for Hilbert space
operators to Khatri-Rao sums for Hilbert space operators. This kind of operator sum is …

We develop further theory for Khatri-Rao products of Hilbert space operators in connections
with selection operators. We provide two constructions related to selection operators. Then …