Disproving a conjecture of Thornton on Bohemian matrices
The authors provide a counterexample for a conjecture about Hessenberg matrices. They establish several results which lead to the counterexample, thus concluding that the conjecture is false. For this counterexample, they use a matrix of order 10, but they claim that the conjecture is false for a matrix of order 11 as well. Some open problems are described in the last section. This paper is easy to read and it is an interesting source for future researchers.
scientific article; zbMATH DE number 7435662