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...

We construct two non-semisimple braided ribbon tensor categories of modules for each singlet vertex operator algebra $${\mathcal {M}}(p)$$ , $$p\ge 2$$ . The first category consists all finite-length -modules with atypical composition factors, while the second is subcategory that induce to local triplet {W}}(p)$$ show every irreducible module has a projective cover in these categories, although...

In this paper we show that if q is a power of a prime p , then the projective special linear group PSL(2, q) and the stabilizer of a point of the projective line have maximum sum element orders among all proper subgroups of projective general linear group PGL(2, q) for q odd and even respectively

In this paper we present an electric field volume integral equation approach to simulate surface plasmon propagation along metal/dielectric interfaces. Metallic objects embedded in homogeneous dielectric media are considered. Starting point is a so-called weak-form of the electric field integral equation. This form is discretized on a uniform tensorproduct grid resulting in a system matrix whos...

In this note the fractional analytic index, for a projective elliptic operator associated to an Azumaya bundle, of [5] is related to the equivariant index of [1, 6] for an associated transversally elliptic operator.