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All matrices are built using rows of integers defined by the class
integer_row
. A single integer_row
is also used in a few
functions in matrices and linear inequalities such as filter
,
shuffle
and del_columns
. The size or the number of
elements in a single row is given by the function n()
. If a
matrix A
is given, the i-th row of the matrix is
A[i]
, which is of the class integer_row
.
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