9. Let II € B(H) be a projection. Let Ho = IIH. %3D (a) Show that H, is a subspace of H. (b) Show that Jv) E H, if and only if II|») = |). (c) Show that Ho is a subspace of H.

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ISBN:9780470458365
Author:Erwin Kreyszig
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9. Let II € B(H) be a projection. Let Ho = IIH.
(a) Show that Ho is a subspace of H.
(b) Show that J) E H, if and only if II|4») = |6).
(c) Show that Hộ is a subspace of H.
Transcribed Image Text:9. Let II € B(H) be a projection. Let Ho = IIH. (a) Show that Ho is a subspace of H. (b) Show that J) E H, if and only if II|4») = |6). (c) Show that Hộ is a subspace of H.
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