Atrial fibrillation (AF) from the ligament/vein of Marshall (LOM/VOM) has previously been described. We report the case of a 23-year-old woman with an antiarrhythmic drug-resistant AF induced by two distinct atrial tachycardias (ATs). Focal ablation of these ATs from the double-exit of the Marshall bundle using a three-dimensional map eliminated AF triggering, even though pulmonary vein electri...

First counterexamples are given to a basic question raised in: M. Marshall, Open questions in the theory of spaces of orderings, J. Symbolic Logic 67 (2002), 341352. The paper considers the space of orderings (X,G) of the function field of a real irreducible conic C over the field Q of rational numbers. It is shown that the pp conjecture fails to hold for such a space of orderings when C has no...

The Zipf distribution also known as scale-free distribution or discrete Pareto distribution, is the particular case of Power Law distribution with support the strictly positive integers. It is a one-parameter distribution with a linear behaviour in the log-log scale. In this paper the Zipfian distribution is generalized by means of the Marshall-Olkin transformation. The new model has more flexi...