We have investigated the detailed field and temperature dependence of the dielectric constant, electric polarization, magnetization and magnetostriction in orthorhombic HoMn<Subscript>2</Subscript>O<Subscript>5</Subscript> single crystals. HoMn<Subscript>2</Subscript>O<Subscript>5</Subscript> displays incommensurate antiferromagnetic ordering below 39 K, becoming commensurate on...</subscript></subscript></subscript></subscript>

This paper presents a method for defining a consistent market through the interpretation of different agents´ opinions. We suppose that every agent has his own opinion about the other agents being his possible competitors or not. These opinions are ex-ante defined and therefore (for a...

We provide axiomatic characterizations of two natural families of rules for aggregating equivalence relations: the family of join aggregators and the family of meet aggregators. The central conditions in these characterizations are two separability axioms. Disjunctive separability, neutrality,...

We study group formation by heterogeneous players when players’ preferences are dictated by status-seeking. Status can be intrinsic or associative. Considering these two types of status as either complements or substitutes results in non-emptiness of the core of the corresponding games and...

We consider one-to-one matching problems under two modalities of uncertainty that differ in the way types are assigned to agents. Individuals have preferences over the possible types of the agents from the opposite market side and initially know the “name” but not the ”type” of the other...