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sparse matrices

• To: math group <mathgroup at yoda.physics.unc.edu>
• Subject: sparse matrices
• From: Robert Dahlgren <dahlgren at draper.com>
• Date: 6 Apr 1992 18:41:14 -0500

                       Subject:                               Time:5:27 PM
  OFFICE MEMO          sparse matrices                        Date:4/6/92
I am in need of information on sparse matrix packages for mathematica or other
suggestions how to handle 12x12 or even 20x20 matrices.  These consist of a
number of 2x2, 4x4 and 8x8 scattering matrices assembled along the diagonal of
a global scattering matrix, with most of the off-diagonal coefficients zero.  I
need to calculate the inverse, eigenvalues & eigenvectors, and evenyually
transforming to more compact global matrix.

Any information on an approach before I get started would be helpful.  Also,
has anyone worked on mapping optical polarization states onto the Poincare
sphere?  Thank you.

Robert Dahlgren
the Charles Stark Draper Lab
555 Technology Square
Cambridge, Mass. 02139
617-258-1158