Andreas Lauser 575855f896 add tridiagonal matrix ...

this class can do both, more and less than dune-istl's BTDMatrix. more
because it supports entries on the lower left and upper right, less
because it does not support a block structure. The primary motivation
for this class were the spline classes which for which the former
feature is required to implement periodic splines and the latter is
not necessary...

2013-09-09 13:17:47 +02:00

..

core

add tridiagonal matrix

2013-09-09 13:17:47 +02:00