Couldn't you use SCIP for this?
http://scip.zib.de/
http://trac.sagemath.org/sage_trac/ticket/10879
On Friday 13 Apr 2012, Nathann Cohen wrote:
> Hello everybody !!!
>
> I would like to solve a set of equations with a very easy shape. My
> equations are defined on variables p1_x, p1_y, p2_x, p2_y, ..., and I
>
> would like to obtain values for them satisfying constraints like :
> |p1 - p2| < 1, i.e. (p1_x - p2_x)^2 + (p1_y - p2_y)^2 < 1
>
> or something similar with a > instead of <. I do not really mind
> whether the inequalities are strict or not, as I feel free to replace
> < 1 by <= 0.9.
>
> Would you know of any way to solve this type of equations, or to
> ensure that no solution exists ?
>
> Thank yo ! :-)
>
> Nathann
Cheers,
Martin
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