Closed range and nonclosed range adjointable operators on Hilbert -modules
Closed range and nonclosed range adjointable operators on Hilbert -modules
复制标题
Hilbert 模上的闭域和非闭域可伴随算子
DOI:
10.1007/s11117-017-0538-1
复制
发表时间:
2018
期刊:
影响因子:
1
通讯作者:
Xu Qingxiang
中科院分区:
文献类型:
--
作者:
Vosough Mehdi;Moslehian Mohammad Sal;Xu Qingxiang
In this paper, we show that for a positive operatorAon a Hilbert-module, the rangeofAis closed if and only ifis closed for all, and this occurs if and only iffor all. As an application, we prove that for an adjontable operatorAifis nonclosed, then. Finally, we show that for an adjointable operatorAifis orthogonally complemented in, then under certain coditions there exists an idempotentCand a unique operatorXsuch thatand, whereis the orthogonal projection ofonto.