Products of EP elements in reflexive semigroups

Reflexive–EP elements in rings

We define and characterize reflexive–EP elements in rings, that is elements which commute with their image-kernel (p, q)-inverse.

Products Of EP Operators On Hilbert C*-Modules

In this paper, the special attention is given to the  product of two  modular operators, and when at least one of them is EP, some interesting results is made, so the equivalent conditions are presented  that imply  the product of operators is EP. Also, some conditions are provided, for which the reverse order law is hold. Furthermore, it is proved  that $P(RPQ)$ is idempotent, if $RPQ$†</...

Set products in transformation semigroups

We describe products of arbitrary L, R, and H-classes with the set of idempotents of full transformation semigroups.

Semidirect Products of Ordered Semigroups

Semidirect Products of Ordered Semigroups