Suchergebnisse

Nous déterminons tous les tenseurs de Weyl d'un espace-temps de la relativité générale, connaissant les quatre directions isotropes réelles caractéristiques. Nous donnons les expressions du tenseur de Weyl dans les cas singuliers. Dans le cas général, nous calculons une expression du tenseur de Weyl dépendant symétrique¬ ment des quatre directions isotropes. Nous donnons enfin, dans les différents cas, un exemple de métrique.

IN THIS NOTE THE AUTHORS STUDY DIFFERENT METHODS OF AGGREGATION OF PREFERENCES MET ON THE OCCASION OF ELECTIONS. THROUGH A SIMPLE GEOMETRICAL REPRESENTATION, THEY ANALYSE SEVERAL OF THEIR PROPERTIES, IN PARTICULAR THOSE LINKED TO ARROW'S THEOREM FOR ORDINAL RANKINGS; THEY PURSUE THIS DISCUSSION IN THE CASE OF CARDINAL RANKINGS, THE QUALITIES OF WHICH CONVINCE US OF THE USEFULNESS OF EXPERIENCING THEIR INTRODUCTION IN REAL BALLOTS.

ABSTRACTThe problem of fair representation is studied in the case of cleavage according to one or two criteria. In the latter case we show that with minimal requirements of equity, a solution exists only if the two criteria are binary. This might explain an observed tendency to political bipolarization.

A formal mathematical model is used to explore the problem of fair representation in the case of cleavage according to one or two criteria. In two-criterion situations, a solution exists that meets minimal equity requirements only if the two criteria are binary. This may explain an observed tendency to political bipolarization. 5 Tables, 8 References. Modified HA