Journal ArticleDOI
Generalization of sharp and core partial order using annihilators
Reads0
Chats0
TLDR
In this article, the sharp order is extended to the set of elements for which left and right annihilators are respectively principal left and principal right ideals generated by the same idempotent.Abstract:
The sharp order is a well known partial order defined on the set of complex matrices with index less or equal one. Following Semrl's approach, Efimov extended this order to the set of those bounded Banach space operators $A$ for which the closure of the image and kernel are topologically complementary subspaces. In order to extend the sharp order to arbitrary ring $R$ (particulary to Rickart and Rickart $*$-rings) we use the notions of annihilators. The concept of the sharp order is extended to the set $\mathcal{I}_R$ of those elements for which left and right annihilators are respectively principal left and principal right ideals generated by the same idempotent. It is proved that the sharp order is a partial order relation on $\mathcal{I}_R$. Following the idea we also extend and discuss the recently introduced concept of core partial order.read more
Citations
More filters
Journal ArticleDOI
Partial orders based on core-nilpotent decomposition
Hongxing Wang,Xiaoji Liu +1 more
Journal ArticleDOI
Partial orders on B(H)
TL;DR: In this article, the sets of all B∈B(H) such that AρB and BρA such that BρB are characterized, where A ∈B (H) is given and ρ∈{≤−,≤⊕,≦#,≫,≩,≠⊚,≥⊆,≡⊜}.
Journal ArticleDOI
Some orders for operators on Hilbert spaces
TL;DR: Some interesting properties of the diamond, (left, right) star and sharp orders for operators on Hilbert spaces are presented.
Journal ArticleDOI
Orders in rings based on the core-nilpotent decomposition
TL;DR: In this article, the notion of the Drazin order, the C-N partial order and the S-minus partial order is extended from, the set of all matrices over a field, to the set OF invertible elements in rings with identity.
Journal ArticleDOI
Core partial order in rings with involution
TL;DR: In this paper, the reverse order law for core partial order in unital rings with involution is investigated. Butler et al. give several characterizations and properties of core partial orders in unalital rings and give relationships between partial orders and other partial orders.