Translation and dilation invariant subspaces of L2 (R).

Translation and dilation invariant subspaces of L2 (R).
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L2 (R) 的平移和膨胀不变子空间。

DOI:
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发表时间:
2002
期刊:
影响因子:
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通讯作者:
S. Power
S. Power
中科院分区:
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文献类型:
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作者:
A. Katavolos;S. Power

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Hilbert空间L ~ 2 R ~* R ~* 的闭子空间,它们在乘Hyr ~* R ~* 函数和伸缩算子f ~* x ~* R ~* 的情况下不变。f ∈ sx,1 < s < y,被确定为两个参数的子空间族L2 1/2a; B,0 ea,bey,它们对于乘法算子是约化的,以及四个参数的非约化子空间族。格和拓扑结构的确定和使用算子代数方法的相应的家庭的正交投影,与弱算子拓扑,被确定为一个紧凑的连通4-流形。
The closed subspaces of the Hilbert space L2ðRÞ which are invariant under multiplication by HyðRÞ functions and the dilation operators f ðxÞ ! f ðsxÞ, 1 < s < y, are determined as the two parameter family of subspaces L2½a; b, 0ea, bey, which are reducing for multiplication operators, together with a four parameter family of nonreducing subspaces. The lattice and topological structure are determined and using operator algebra methods the corresponding family of orthogonal projections, with the weak operator topology, is identified as a compact connected 4-manifold.