Dado un conjunto con determinada cantidad de elementos, es posible calcular la cardinalidad del conjunto formado por todos los subconjuntos del conjunto dado, que cumplen con la propiedad de ser disjuntos y tal que además la unión de todos ellos sea el conjunto original. Esto es, determinar el...

Recent turmoil in financial and commodities markets has renewed questions regarding how well markets discover equilibrium prices, particularly when those markets are highly complex. A relatively new critique questions whether markets can realistically find equilibrium prices if computers cannot....

We consider the following problem: estimate the size of a population marked with serial numbers after only a sample of the serial numbers has been observed. Its simplicity in formulation and the inviting possibilities of application make this estimation well suited for an undergraduate level...

In this and a sequel paper [10] we study combinatorial designs whose incidence matrix has two distinct singular values.These generalize 2-(v, k, É) designs, and include partial geometric designs and uniform multiplicative designs.Here we study the latter, which are precisely the nonsingular...