Linear preservers of equivalence relations on infinite-dimensional spaces

被引:6
|
作者
Petek, Tatjana [1 ,2 ]
Radic, Gordana [1 ]
机构
[1] Univ Maribor, Fac Elect Engn & Comp Sci, Smetanova Ul 17, SI-2000 Maribor, Slovenia
[2] Inst Math Phys & Mech, Jadranska Ul 19, SI-1000 Ljubljana, Slovenia
关键词
linear preservers; equivalence preservers; preservers of equivalence by unitaries; congruence preservers; ADDITIVE MAPS; SIMILARITY; OPERATORS; MATRICES; MAPPINGS; B(H); INVERTIBILITY;
D O I
10.4064/sm8356-12-2016
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Linear maps preserving equivalence, equivalence by unitaries or congruence, acting on an infinite-dimensional Banach/Hilbert space, are classified. In the first two cases a unified approach is used: we identify the orbit of the identity and show that it is invariant under the map under consideration. Known results on linear invertibility or unitary group preservers are then used.
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页码:101 / 119
页数:19
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