– SuperLU routine (version 2.0) –
Univ. of California Berkeley, Xerox Palo Alto Research Center,
and Lawrence Berkeley National Lab.
November 15, 1997
Purpose
Compute the reciprocal pivot growth factor of the leading ncols columns
of the matrix, using the formula:
min_j ( max_i(abs(A_ij)) / max_i(abs(U_ij)) )
Arguments
ncols (input) int
The number of columns of matrices A, L and U.
A (input) SuperMatrix*
Original matrix A, permuted by columns, of dimension
(A->nrow, A->ncol). The type of A can be:
Stype = NC; Dtype = SLU_D; Mtype = GE.
L (output) SuperMatrix*
The factor L from the factorization Pr*A=L*U; use compressed row
subscripts storage for supernodes, i.e., L has type:
Stype = SC; Dtype = SLU_D; Mtype = TRLU.
U (output) SuperMatrix*
The factor U from the factorization Pr*A*Pc=L*U. Use column-wise
storage scheme, i.e., U has types: Stype = NC;
Dtype = SLU_D; Mtype = TRU.