Manifolds of Hilbert space projections
Manifolds of Hilbert space projections
复制标题
希尔伯特空间投影的流形
DOI:
10.1112/plms/pdp035
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发表时间:
2010
影响因子:
1.8
通讯作者:
Levene R
中科院分区:
文献类型:
--
作者:
Levene R
The Hardy spaceH2(ℝ) for the upper half-plane together with a multiplicative group of unimodular functionsu(λ) = exp(i(λ1ψ1+ … +λnψn)), with λ ∈ ℝn, gives rise to a manifold ℳ of orthogonal projections for the subspacesu(λ)H2(ℝ) ofL2(ℝ). For classes of admissible functionsψithe strong operator topology closures of ℳ and ℳ ∪ ℳ⊥are determined explicitly as variousn-balls andn-spheres. The arguments used are direct and rely on the analysis of oscillatory integrals (E. M. Stein,Harmonic analysis: real-variable methods, orthogonality, and oscillatory integrals, Princeton Mathematical Series 43 (Princeton University Press, Princeton, NJ, 1993)) and Hilbert space geometry. Some classes of these closed projection manifolds are classified up to unitary equivalence. In particular, the Fourier–Plancherel 2-sphere and the hyperbolic 3-sphere of Katavolos and Power (A. Katavolosand S. C. Power, Translation and dilation invariant subspaces ofL2(ℝ),J. reine angew. Math.552 (2002) 101–129) appear as distinguished special cases admitting non-trivial unitary automorphism groups, which are explicitly described.
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影响因子:
0.8
作者:
A. Katavolos;S. Power
通讯作者:
S. Power
影响因子:
3.7
作者:
P. Lax
通讯作者:
P. Lax
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
R. Levene
通讯作者:
R. Levene
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
J. Rawnsley
通讯作者:
J. Rawnsley
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
A. Katavolos;S. Power
通讯作者:
S. Power