We construct nonisogenous simple ordinary abelian varieties over an algebraic closure of a finite field with isomorphic endomorphism algebras.

Stroke is a devastating event for patients and their families. Paradoxical embolism through a patent foramen ovale (PFO) is a recognized cause of stroke. Percutaneous PFO closure is a simple and safe procedure. The debate on PFO closure is far from settled. This is, in part, due to the fact that the three published randomized controlled trials (RCTs) on PFO closure vs. medical therapy were nega...

In the field of non-monotonic logics, the notion of rational closure is acknowledged as a landmark, and we are going to see that such a construction can be characterised by means of a simple method in the context of propositional logic. We then propose an application of our approach to rational closure in the field of Description Logics, an important knowledge representation formalism, and prov...