报告时间：2022年11月25日（星期五）16:00-18:00

报告地点：腾讯会议：566-186-522

报 告 人：Dragan Rakic 教授

工作单位：University of Nis

举办单位：数学学院

报告人简介：Dragan Rakic，塞尔维亚尼什大学教授，2015年博士毕业于尼什大学，主要研究方向为泛函分析、算子理论、广义逆及偏序理论。在专业杂志上等杂志上发表高质量论文20余篇，并主持塞尔维亚科学基金项目2项、及塞尔维亚与思罗维尼亚双边项目1项。

报告简介： Let A be a unital ring admitting involution. We introduce an order on A and show that in the case when A is a Rickart ∗-ring, this order is equivalent to the well-known star partial order. The notion of the left-star and the right-star partial orders is extended to Rickart ∗-rings. Properties of the star, the left-star and the right-star partial orders are studied in Rickart ∗-rings and some known results are generalized. We found matrix forms of elements a and b when a ≤ b, where ≤ is one of these orders. Conditions under which these orders are equivalent to the minus partial order are obtained. The diamond partial order is also investigated.