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

934 HP MLIB User’s Guide
DSLEOP Select reordering scheme
INTEGER*8 ier
REAL*8 global(150)
CALL DSLEOP(order, global, ier)
CHARACTER*3 order
INTEGER*8 ier
REAL*8 global(150)
CALL QSLEOP(order, global, ier)
CHARACTER*3 order
INTEGER*8 ier
REAL*8 global(150)
CALL CSLEOP(order, global, ier)
CHARACTER*3 order
INTEGER*8 ier
REAL*8 global(150)
CALL ZSLEOP(order, global, ier)
Input order
The reordering scheme used by the solver. The
reordering scheme depends on the matrix structure
input as follows.
For matrix structure input by matrix, use one of the
following seven options:
order = ’MMD’ or ’mmd’
Use the Multiple Minimum Degree
ordering. This is the default used by
xSLEIN—Refer to “DSLEIN” on
page 921.
order = ’NAT’ or ’nat’
Use natural ordering.
order = ’RCM’ or ’rcm’
Use reverse Cuthill McKee (rcm)
ordering.
order = ’1WD’ or ’1wd’
Use one-way Dissection ordering.
order = ’GND’ or ’gnd’
Use General Nested Dissection
ordering.
order = ’MET’ or ’met’