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Hi,
I am currently trying to create a Polytope from a matrix and a vector. Therefore I create linear expressions from the coefficients of the matrix in combination with the associated PPL-Variables. Afterwards I can add an inhomogenous term from the given vector.
As far as I read the documentation I can construct a Polytope naturally by adding constraints. These constraints are supposed to be constructed from a relation of either a linear expression and a constant (my inhomogenuous term, if you want to put it that way) or a relation from two linear expressions. I tried both ways, but the constraint created seems to be empty. How am I supposed to create and use the needed Constraints?
Short example:
Linear expression: A + 3*B - 5 (when printed) resulting constraint: 0 >= -5 (created by:
Parma_Polyhedra_Library::Constraint constraint = expr <= 0
, where expr is the linear expression)
Best regards, Stefan
- -- Stefan Schupp M.Sc. RWTH Aachen University Computer Science Department, Informatik 2 D-52056 Aachen, Germany http://www-i2.informatik.rwth-aachen.de/i2/schupp/ Tel.: +49 241 80 21243