[ublas] ublas: tridiagonal with diagonal=upper+lower

Subject: [ublas] ublas: tridiagonal with diagonal=upper+lower
From: Hicham Mouline (hicham_at_[hidden])
Date: 2009-05-29 07:49:48

Hello,
Is there a special name for tridiagonal matrices that have the property:
a(i,i) = a(i, i-1) + a(i, i+1)
where the first index is the row, and the 2nd is the column.
Do these matrices have special properties?

Regards,