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math.RA2017
Lattice of closure endomorphisms of a Hilbert algebra
Jānis Cīrulis
A closure endomorphism of a Hilbert algebra A is a mapping that is simultaneously an endomorphism of and a closure operator on A. It is known that the set CE of all closure endomor…
math.RA2014
On one-sided star partial orders on a Rickart *-ring
Janis Cirulis
We compare some recent approaches to extending the notions of left- and right-star partial order, introduced for complex matrices in early 90-ies, to bounded linear Hilbert space o…