a. Which of the following subspaces of U are invariant under D? (i). <1>, (ii). <1, a >, (iii). < COs a >, (iv). < cos a, sin a >.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
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3

a. Which of the following subspaces of U are invariant under D?
(i). <1>,
(ii). <1, a >,
(iii). < cos a>,
(iv). < cos z, sin a>.
b. Determine all 1-dimensional linear subspaces of U invariant under D.
Transcribed Image Text:a. Which of the following subspaces of U are invariant under D? (i). <1>, (ii). <1, a >, (iii). < cos a>, (iv). < cos z, sin a>. b. Determine all 1-dimensional linear subspaces of U invariant under D.
27 In the vector space of differentiable functions from R to R we consider the
linear subspace U =< cos r, sin r, r, 1 >. The linear map D: U + U is given
by differentiation:
(Df)(r) = f'(x).
Transcribed Image Text:27 In the vector space of differentiable functions from R to R we consider the linear subspace U =< cos r, sin r, r, 1 >. The linear map D: U + U is given by differentiation: (Df)(r) = f'(x).
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