The initial number of extra
matrix elements
to allow for in the matrix, including coefficients for cuts. If rows or columns are to be added to
the matrix, then, for maximum efficiency, space should be reserved for the extra matrix elements
before the matrix is input by setting the
EXTRAELEMS control. If this is not done,
resizing will occur automatically, but more space may be allocated than the user actually requires.
The space allowed for cut coefficients is equal to the number of extra matrix elements remaining
after rows and columns have been added but before the global optimization starts.
EXTRAELEMS is set automatically by the optimizer when the matrix is first input to allow space
for cuts, but if you add rows or columns, this automatic setting will not be updated. So if you wish
cuts, either automatic cuts or user cuts, to be added to the matrix and you are adding rows or
columns,
EXTRAELEMS must be set before the matrix is first input, to allow space both for
the cuts and any extra rows or columns that you wish to add.