Abstract This paper discusses set visualisations with concept lattices in the sense of Formal Concept Analysis (FCA) contrast to Euler diagrams. Both types have advantages and disadvantages. Because connection between both fields body knowledge that exists it is interest investigate whether results from either field can contribute other.

The relationship between classes of tree-to-tree-series and o-tree-to-tree-series transformations, which are computed by restricted deterministic bottom-up weighted tree transducers, is investigated. Essentially, these transducers are deterministic bottom-up tree series transducers, except that the former are defined over monoids whereas the latter are defined over semirings and only use the mu...

Eva Bayer-Fluckiger (École Polytechnique Fédérale de Lausanne) Title: Galois algebras, Hasse principle and induction-restriction methods Abstract: The aim of this talk is to survey old and new results on self-dual normal bases and more generally invariants of Galois algebras. Particular attention will be given to local-global principles. Some of the results make use of an inductionrestriction m...

For a basic background on elliptic curves, we refer to [11]. For a prime p > 3, we denote by Fp the finite field of p elements, which we identify with the set of integers {0,±1, . . . ,±(p− 1)/2}. When p ∤ 4a+27b, the set Ea,b(Fp), consisting of the Fp-rational points of Ea,b together with a point at infinity O, forms an abelian group under an appropriate composition rule called addition, and t...