Unitaries permuting two orthogonal projections
Unitaries permuting two orthogonal projections
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DOI:
10.1016/j.laa.2017.03.026
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发表时间:
2017-03
影响因子:
1.1
通讯作者:
B. Simon
中科院分区:
文献类型:
--
作者:
B. Simon
Let P and Q be two orthogonal projections on a separable Hilbert space, H. Wang, Du and Dou proved that there exists a unitary, U, with U P U− 1= Q, U Q U− 1= P if and only if dim(ker P∩ ker(1− Q))= dim(ker Q∩ ker(1− P))(both may be infinite). We provide a new proof using the supersymmetric machinery of Avron, Seiler and Simon.