# A call to MA28AD must precede a call to MA28BD and a call to MA28AD or
# MA28BD must precede a call to MA28CD or MA28ID.

file	harwell/ma28ad.f
for	LU factorization, general sparse matrix, pivoting for sparsity and stability, may be unsymmetric

file	harwell/ma28id.f
for	LU factors from (harwell/ma28ad or ma28bd), solves linear equations by iterative refinement

file	harwell/ma28cd.f
for	solves linear equations using LU factors computed from (harwell/ma28ad) or (harwell/ma2bbd)

file	harwell/ma28bd.f
for	LU factorization, general sparse matrix, previously factored by (harwell/ma28d) but with numerical different values

file	harwell/ma28.f
for	gets ALL of the Harwell MA28 routines

