Claudio, you have to redefine such a type. I have done so in the SPPoC package that provides an API for parameterized linear optimization and symbolic polyhedron manipulation. You may want to have a look at it. It is downloadable on . Regards, Pierre. Claudio Trento wrote: > Hello, > I would know if there is a way to create a linear constraint like "2x + 3y > >>6" in Ocaml. I've try to define new type but don't like me so much... > > > Thanks, > Claudio -- Pierre Boulet