I'm taking my first discrete math course. One aspect of functions has me stumped. We're asked to list the functions from a two-element set to a three-element set. And then list all the functions ...

Roma Kačinskaitė, Kohji Matsumoto, Łukasz Pańkowski, On Mixed Joint Discrete Universality for a Class of Zeta-functions, Taiwanese Journal of Mathematics, Vol. 27, No. 2 (April 2023), pp. 221-236 ...

The admissibility of test statistics based on some of these functions is shown in Section 4 and a few examples are given in Section 5. The purpose of the Institute of Mathematical Statistics (IMS) is ...