Each of the following properties defines a set of real n \ n matrices. Find out which sets are dense, and which are open in the space L(R") of all linear opera- tors on R": (a) determinant 0; (b) trace is rational; (c) entries are not integers; determinant < 4; (d) 3 (e) -1 < | A | < 1 for every eigenvalue >; no real eigenvalues; (f) each real eigenvalue has multiplicity one
Each of the following properties defines a set of real n \ n matrices. Find out which sets are dense, and which are open in the space L(R") of all linear opera- tors on R": (a) determinant 0; (b) trace is rational; (c) entries are not integers; determinant < 4; (d) 3 (e) -1 < | A | < 1 for every eigenvalue >; no real eigenvalues; (f) each real eigenvalue has multiplicity one
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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(d),(e),(f),(g)

Transcribed Image Text:Each of the following properties defines a set of real n × n matrices. Find out
which sets are dense, and which are open in the space L(R") of all linear opera-
tors on R":
(a) determinant ≈ 0;
(b) trace is rational;
(c)
entries are not integers;
3 ≤ determinant < 4;
(d)
(e) -1 < | > | < 1 for every eigenvalue λ;
(f) no real eigenvalues;
(g)
each real eigenvalue has multiplicity one.
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