We give a counterexample to the Strong Bang-Bang Conjecture according to which any 3 - 3 embeddable matrix can be expressed as a product of six Poisson matrices. We exhibit a 3 - 3 embeddable matrix which can be expressed as a product of seven but not six Poisson matrices. We show that an...

This paper is concerned with asymptotic properties of the maximum likelihood estimators for the discrete-time square-root process. This process and its generalizations are employed in financial literature as models for movements of asset prices. the considered process is nonergodic and therefore...