2. Let A E B(H) be self-adjoint. Show that A E R(A) if and only if there is an open neighborhood UCR of A with xu(A) = 0
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2. Let A E B(H) be self-adjoint. Show that A E R(A) if and only if there is an open neighborhood UCR of A with xu(A) = 0
2. Let A E B(H) be self-adjoint. Show that A E R(A) if and only if there is an open neighborhood UCR of A with xu(A) = 0. MITTY
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