Before revision:  The proposed solution has two variants, cuPC-E and cuPC-S, which parallelize PC in two different ways  . Experimental results show significant speedup .
After revision:  The proposed solution has two variants, cuPC-E and cuPC-S, which parallelize PC in two different ways . Experimental results show the scalability of the proposed algorithms with respect to the number of variables, the number of samples, and different graph densities .