[eclipse-clp-users] Symmetry

I have a problem for which the boolean optimization variables are of the
following form (a matrix):

 

x_11, x_12, .., x_1n

x_21, x_22, .., x_2n

.

x_n1, x_n2, .., x_nn

 

In my case a solution of the form

0 1 0 1

0 0 0 1

0 1 0 1

Is identical with 

1 0 1 0

0 0 1 0

1 0 1 0

>From the cost function point of view.

 

Can you please tell me how to ignore exploring the symmetrical solutions of
this form ?

 

Thanks,

Bogdan.