کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6416715 | 1336855 | 2013 | 12 صفحه PDF | دانلود رایگان |
Let AlgN be a nest algebra associated with the nest N on a (real or complex) Hilbert space H. We say that AlgN is zero product determined if for every linear space N and every bilinear map Ï:AlgNÃAlgNâV the following holds: if Ï(A,B)Â =Â 0 whenever ABÂ =Â 0, then there exists a linear map T such that Ï(A,B)=T(AB) for all A,BâAlgN. If we replace in this definition the ordinary product by the Jordan (resp., Lie) product, then we say that AlgN is zero Jordan (resp., Lie) product determined. We show that any finite nest algebra over a complex Hilbert space is zero product determined, and it is also zero Jordan product determined. Moreover, we show that any finite-dimensional nest algebra on a (real or complex) Hilbert space is zero Lie (resp., associative, Jordan) product determined. In addition, we characterize separately strongly operator topology continuous bilinear map Ï from AlgNÂ ÃÂ AlgN into a topological linear space V with the property that Ï(A,B)=0 whenever ABÂ =Â 0 or Ï(A,B)=0 whenever ABÂ +Â BAÂ =Â 0.
Journal: Linear Algebra and its Applications - Volume 438, Issue 1, 1 January 2013, Pages 303-314