Characterizations of derivations on triangular rings: Additive maps derivable at idempotents
Characterizations of derivations on triangular rings: Additive maps derivable at idempotents
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三角环上的推导的表征:可在幂等处导出的加法映射
DOI:
10.1016/j.laa.2009.04.005
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发表时间:
2009-08
影响因子:
1.1
通讯作者:
Hou, Jinchuan
中科院分区:
文献类型:
--
作者:
An, Runling;Hou, Jinchuan
Let T be a triangular ring. An element Z∈T is said to be a full-derivable point of T if every additive map δ from T into itself derivable at Z (i.e. δ(A)B+Aδ(B)=δ(Z) for every A,B∈T with AB=Z) is in fact a derivation. In this paper, under some mild conditions on triangular ring T, we show that some idempotent elements of T are full-derivable points. As an application, we get that, for any nontrivial nest N in a factor von Neumann algebra R, every nonzero idempotent element Q satisfying PQ=Q, QP=P for some projection P∈N is a full-derivable point of the nest subalgebra AlgN of R.
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DOI:
10.1112/s0024610700001642
发表时间:
2001-02
期刊:
Journal of the London Mathematical Society
影响因子:
--
作者:
W. Cheung
通讯作者:
W. Cheung
影响因子:
1.1
作者:
W. Cheung
通讯作者:
W. Cheung
影响因子:
1.1
作者:
Qi, Xiaofei;Hou, Jinchuan
通讯作者:
Hou, Jinchuan
影响因子:
1.1
作者:
Hou, Jinchuan;Qi, Xiaofei
通讯作者:
Qi, Xiaofei
影响因子:
1.7
作者:
F. Gilfeather;D. Larson
通讯作者:
F. Gilfeather;D. Larson