| iterpc-package | Iterator for Permutations and Combinations |
| getall | Get all permutation/combination for a iterator |
| getcurrent | Get the current element of a iterator |
| getlength | Get the length for a iterator |
| getnext | Get the next permutation(s)/combination(s) for a iterator |
| iterpc | Iterator for Permutations and Combinations |
| multichoose | Calculate mulinomial coefficient |
| nc_multiset | Calcuate the number of combinations of a multiset |
| np_multiset | Calcuate the number of r-permutations of a multiset |