Let X be a normed linear space over F. It follows from Exercise 1 that X* B(X,F) is a Banach space. (X* is called the dual space of X and elements of X are called bounded linear functionals.) Prove that if {rn} is a sequence in X such that {F(rn)} is bounded for every F in X, then the sequence {rnll} is bounded.
Let X be a normed linear space over F. It follows from Exercise 1 that X* B(X,F) is a Banach space. (X* is called the dual space of X and elements of X are called bounded linear functionals.) Prove that if {rn} is a sequence in X such that {F(rn)} is bounded for every F in X, then the sequence {rnll} is bounded.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.2: Linear Independence, Basis, And Dimension
Problem 4AEXP
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