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We currently use PORTA software to find the list of facet-defining inequalities (FDI) for polytopes that we work with. For certain polytopes, PORTA works fine. But because it is a serial algorithm (uses Fourier-Motzkin) we sometimes encounter cases where the analysis simply takes too long and we have to force the program to stop. We are wondering if there exists a parallel algorithm that would allow us to complete these computations faster? Ideally we would prefer to have exact solutions like PORTA gives; but in lieu of such software programs we would be open to trying a method that may not yield exact results. (And if it matters: our input coordinates are almost always discrete, either 0 or 1.)

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