HP MLIB User's Guide Vol. 2 7th Ed.

1024 HP MLIB User’s Guide
DSEVE1 One-call usage
bcolst If B is specified as a general sparse matrix with
structure different than A, then bcolst(j) gives the
ordinal in browin of the first nonzero in the lower
triangular part of column j of the matrix B. All of the
nonzeros for column j are found in ascending order in
browin(bcolst(j)), browin(bcolst(j)+1), ...,
browin(bcolst(j+1)−1).
bcolst(norder+1) must be set to one greater than the
total number of nonzeros, bnnzer in the lower
triangular part of the matrix.
Not referenced unless the matrix B is specified as
anything other than a general sparse matrix with
structure different from A.
browin List of row indices for all nonzeros in ascending order
within each column in the lower triangle part of the
matrix B.
Not referenced unless the matrix B is specified as
anything other than a general sparse matrix with
structure different from A.
bvalue If B is a general sparse matrix, then bvalue contains
the list of values corresponding in position to the
indices in arowin or browin depending on whether B
has the same structure as A or not. If B is diagonal,
then bvalue contains the diagonal entries. Not
referenced if B is the identity.
neigvl Number of eigenvalues to be found, neigvl > 0.
which Character string indicating which eigenvalues are to be
computed. Only the first character is significant, but
longer input can be used for clarity (for example,
’Lowest’ or ’All’).
’L’ or ’l’ The lowest (smallest magnitude)
eigenvalues.
’H’ or ’h’ The highest (greatest magnitude)
eigenvalues.
’C’ or ’c’ or
’N’ or ’n’ The eigenvalues nearest center.
’A’ or ’a’ All eigenvalues in the specified
interval.