A universal cycle for the k-permutations of n = {1, 2, ..., n} is a circular string of length nk that contains each k-permutation exactly once as a substring. Jackson (Discrete Mat...
Alexander E. Holroyd, Frank Ruskey, Aaron Williams
We describe a simple randomized construction for generating pairs of hash functions h1, h2 from a universe U to ranges V = [m] = {0, 1, . . . , m - 1} and W = [m] so that for ever...