Seminar series
Date
Thu, 08 May 2008
Time
14:00 -
15:00
Location
Comlab
Speaker
Prof Beresford Parlett
Organisation
UC Berkeley
The task is to compute orthogonal eigenvectors (without Gram-Schmidt) of symmetric tridiagonals for isolated clusters of close eigenvalues. We review an "old" method, the Submatrix method, and describe an extension which significantly enlarges the scope to include several mini-clusters within the given cluster. An essential feature is to find the envelope of the associated invariant subspace.