Intel® oneAPI Math Kernel Library
Ask questions and share information with other developers who use Intel® Math Kernel Library.
6616 Discussions

Finding the eigenvalues (diagonalizing) of a block-diagonal matrix

Saurabh_Pradhan
Beginner
163 Views

I have to diagonalize a large matrix which take a lot of time. The matrix size 10,000  x 10,000.

This  matrix is Hamiltonian of a spin system which have some block structure. Is there way to diagonalize the full matrix by diagonalize each block ?

Basically I want to

1. permutate the matrix to reduce to a block structure

2. Diagonalize each blocks .

I would appreciate any help.

Similar question for mathematica : https://mathematica.stackexchange.com/questions/170008/finding-the-eigenvalues-diagonalizing-of-a-bl...

Thanks.

0 Kudos
0 Replies
Reply