Let H be a Hilbert space and E c H be a subset of Н. (a) Show that E- is a closed linear subspace of H. (b) Show that (E-)- is the closed linear subspace of H spanned by E.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.1: Vector Spaces And Subspaces
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Let H be a Hilbert space and EcH be a subset of
Н.
(a) Show that E- is a closed linear subspace of H.
(b) Show that (E-)- is the closed linear subspace of H spanned
by E.
Transcribed Image Text:Let H be a Hilbert space and EcH be a subset of Н. (a) Show that E- is a closed linear subspace of H. (b) Show that (E-)- is the closed linear subspace of H spanned by E.
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