Lafora disease (LD) is a rare, fatal neurodegenerative disorder characterized by the accumulation of glycogen-like inclusions in the cytoplasm of cells from most tissues of affected patients. One hundred years after the first description of these inclusions, the molecular bases underlying the processes involved in LD physiopathology are finally being elucidated. The main cause of the disease is...

Extending an original idea of B Jonsson R Lyndon showed in Lyndon how to con struct relation algebras boolean algebras with the binary operator composition the unary operator converse and the constant identity which satisfy the so called Tarski axioms see Henkin et alii J onsson Tarski from projective geometries thus providing a method for deriving consequences in the algebraic theory of binary...

In this paper we extend the results of Kirwan et alii on convexity properties of the moment map for Hamiltonian group actions, and on the connectedness of the fibers of the moment map, to the case of non-compact orbifolds. Our motivation is twofold. First, the category of orbifolds is important in symplectic geometry because, generically, the symplectic quotient of a symplectic manifold is an o...

Our comments will be divided in two parts. The first one some general comments about some of the results of this paper and the second part a comparison with the results of Valls Pereira et alii (1999) 1 will be make. The first point that we will like to make is about the was Prof. Issler treat the "missing data" of some of these series. In order to have equally spaced data, he complete the data...