To the Latimer—Macduffee theorem and beyond! Original Research Article

In this paper we discuss some of the mathematical contributions made by Olga Taussky Todd. We begin with fairly general considerations, commenting on her role as a thesis advisor and giving an overview of her research contributions. Then we consider a specific work of hers, Another look at a matrix of Mark Kac, her last published work, which was written jointly with John Todd. We make a series of observations that explain certain numerical phenomena that they prove in this paper and end with a generalization of their work.