SummaryIn this paper, we explore Mad Veterinarian scenarios. We show how these recreational puzzles naturally give rise to semigroups (which are sometimes groups), and we point out a beautiful, ...

A linear equation is drawn as a straight line on a set of axes. To draw the graph we need coordinates. We generate these coordinates by substituting values into the ...

Let E be a countable directed graph. We show that for the algebra C*(E) the properties of being AF-embeddable, quasidiagonal, stably finite, and finite are equivalent and that these properties hold if ...