[Trilinos-Users] diagonalization

[임재창]

Dear Trilinos developers and users,


I'm using Anasazi package to diagonalize matrices with Epetra_CrsMatrix.(Eigensolver is BlockDavidson)

My problem is that diagonalization sometimes not converged.


The characteristics of the matrix  that i want to diagonalize are


1. diagonal dominent


2. symmetry


3. almost 80~90% of entries are zero


4. i want to know a few lowest eigenvalues


Are there any options which are efficient for diagonalizing these kinds of matrices ?


or any comment to set parameters such as numblocks, maxiteration, number of blocks and etc?


Best regards,


jaechang lim


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