Ordered is an option to the functions KSubsetGroup and KSubsetGroupIndex that tells the functions whether they should treat the input as sets or tuples.

Parent is a tag used as an argument to the function AllPairsShortestPath in order to inform this function that information about parents in the shortest paths is also wanted.

PermutationQ[p] yields True if p is a list representing a permutation and False otherwise.

Permute[l, p] permutes list l according to permutation p.

RandomHeap[n] constructs a random heap on n elements.

RandomVertices[g] assigns a random embedding to graph g.

Runs[p] partitions p into contiguous increasing subsequences.

SelectionSort[l, f] sorts list l using ordering function f.

Spectrum[g] gives the eigenvalues of graph g.

StirlingSecond[n, k] returns the Stirling number of the second kind.