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Aug
12 |
awarded | Good Question |
Jun
4 |
awarded | Notable Question |
Feb
6 |
comment |
Is the Invariant Subspace Problem interesting?
not yet... cafematematico.com/2013/02/05/statement-from-cowen-and-gallardo |
Jan
17 |
awarded | Scholar |
Jan
17 |
accepted | real symmetric matrix has real eigenvalues - elementary proof |
Jan
14 |
awarded | Popular Question |
Jan
13 |
awarded | Nice Question |
Jan
13 |
awarded | Editor |
Jan
13 |
comment |
real symmetric matrix has real eigenvalues - elementary proof
@Tom, Gerald: I apologize for being unclear. I've now corrected my question (I haven't done that before since I thought editing already posted questions could also be confusing). |
Jan
13 |
revised |
real symmetric matrix has real eigenvalues - elementary proof
added 11 characters in body |
Jan
11 |
awarded | Supporter |
Jan
11 |
comment |
real symmetric matrix has real eigenvalues - elementary proof
To clarify the situation - if a real symmetric matrix has one real eigenvalue, all its eigenvalues are real (which can be proved by induction)! |
Jan
11 |
comment |
real symmetric matrix has real eigenvalues - elementary proof
Indeed the question was posed for pedagogical purposes, elementary meaning that a first-year engineering student would be able to follow it! |
Jan
11 |
awarded | Student |
Jan
11 |
asked | real symmetric matrix has real eigenvalues - elementary proof |