NAS Block Tridiagonal (appbt)

The block tridiagonal (BT) benchmark is one of three application
benchmarks contained within the NAS Parallel Benchmarks.  Like the
others, this benchmark simulates an application of importance in
computational fluid dynamics - ARC3D.

The "Class A" problem is solved by this SAT version of the BT program.
For the Class A problem, 200 iterations are required on a three 
dimensional grid that is 64x64x64.

Two versions of the BT executable are supplied in this directory,
bt64 and bt128.  bt64 has been compiled to run in a 64 node
partition.  bt128 has been compiled to run in a 128 node partition.
