used permutation_iterator in sparse matrix-matrix multiply implementation
used permutation_iterator in sparse matrix-matrix multiply implementation

sdalton1/cusplibrary,cusplibrary/cusplibrary,cusplibrary/cusplibrary,sdalton1/cusplibrary,cusplibrary/cusplibrary,cusplibrary/cusplibrary,sdalton1/cusplibrary,sdalton1/cusplibrary