UMFPACK是求解线性方程组AX=B的函数库,其使用非常简单-UMFPACK is a set of routines for solving unsymmetric sparse linear systems, Ax=b, using the Unsymmetric MultiFrontal method.

UMFPACK,用于矩阵计算库，与SuperLU实现相同的功能-UMFPACK, which is used in matrix computing.

CALL ABREADY(N,L) call DADD(N,L,PTR,IND,VAL,FB,BX)