Developing ideas of Borel and Fréchet, we define a partial preorder which classifies measure zero sets of reals according to their open covers and study the induced partial order on the equivalence ...

A memorandum sent Wednesday by the general counsel of the National Labor Relations Board has set the stage for college athletes to be paid directly by their institutions, thus becoming employees. The ...

The aim of this paper is to present a comprehensive set of criteria for classifying as recurrent, transient, null or positive the sets visited by a general state space Markov chain. When the chain is ...