Example 3. The operator Ax = d/dt x(t), defined on the subspace M of C[0, 1] consisting of all continuously differentiable functions, has range C[0, 1]. A is not bounded, however, since elements of arbitrarily small norm can produce elements of large norm when differentiated. On the other hand, if A is regarded as having domain D [0, 1] and range C[0, 1], it is bounded with || A|| = 1.
Example 3. The operator Ax = d/dt x(t), defined on the subspace M of C[0, 1] consisting of all continuously differentiable functions, has range C[0, 1]. A is not bounded, however, since elements of arbitrarily small norm can produce elements of large norm when differentiated. On the other hand, if A is regarded as having domain D [0, 1] and range C[0, 1], it is bounded with || A|| = 1.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.6: Applications And The Perron-frobenius Theorem
Problem 70EQ
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