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- W2952325860 abstract "Given a complex Hilbert space H, we study the differential geometry of the manifold M of all projections in V:=L(H). Using the algebraic structure of V, a torsionfree affine connection $nabla$ (that is invariant under the group of automorphisms of V) is defined on every connected component of M, which in this way becomes a symmetric holomorphic manifold that consists of projections of the same rank r, (0< r < infty). We prove that M admits a Riemann structure if and only if M consists of projections that have the same finite rank r or the same finite corank, and in that case $nabla$ is the Levi-Civita and the Kahler connection of M. Moreover, M turns out to be a totally geodesic Riemann manifold whose geodesics and Riemann distance are computed. Keywords: JBW-algebras, Grassmann manifolds, Riemann manifolds. AMS 2000 Subject Classification: 48G20, 72H51." @default.
- W2952325860 created "2019-06-27" @default.
- W2952325860 creator A5026791955 @default.
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- W2952325860 date "2001-10-11" @default.
- W2952325860 modified "2023-09-27" @default.
- W2952325860 title "The manifold of finite rank projections in the algebra L(H) of bounded linear operators" @default.
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