The QUADRACTIC, HESSIAN,
QUADS1,
QUADOBJ2and
QSECTION3indicator cards are used interchangeably
to announce any nonzero coefficients in the quadratic
objective group
.
Only one of each pair
,
,
of ``off-diagonal'' terms should be given,
but which is unimportant. Any repeated coefficients will be summed.
The syntax for data following these indicator cards
is given in Figure 3.15.
The strings varbl-name in data fields 2 and 3 (and optionally 2 and 5
for those cards whose field 1 does not contain Z)
give the names of pairs of problem variables and
for which
is nonzero.
All problem variables must have been previously set in the
VARIABLES/COLUMNS section. Additionally, on a Z card,
the name of the variable must be an element of an array
of variables, with a valid name and index, while on a X card,
the name may be either a scalar or an array name.
On cards whose field 1 is either empty or contains the character
X, the strings numerical-vl in data fields 4 and (optionally) 6
contain the associated numerical values of the coefficients
. On cards for which field 1 contains the character
Z, the string r-p-a-name in data field 5 gives a real
parameter array name. This name must have been previously defined and
its associated value then gives the numerical value of the parameter.