June 2019
Beginner
553 pages
17h 41m
English
11.
(a) Hint: What is the nullity of How is the multiplicity of the eigenvalue related to the dimension of the eigenspace? For symmetric matrices, eigenvalue computations should be quite accurate. Thus one would expect to get nearly full machine accuracy in the computed eigenvalues of A even though is a multiple eigenvalue.
(b) The roots of a tenth degree polynomial are quite sensitive, i.e., any small roundoff errors in either the data or in the computations are liable to lead to significant errors in the computed roots. In particular if has multiple roots, the computed eigenvalues are label to be complex.
13. Hint: Apply the Rank-Nullity theorem.
14. Hint: See Exercise7 in Section6.1 .
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