How do you aggregate the preferences of multiple agents in a fair manner? This is a question that has occupied researchers for several centuries. Suppose we have k voters who each give their preferences on n candidates. How should the candidates be ranked to best represent the input? Marquis de Condorcet [5] showed that there may not exist a “winner”: a candidate who beats all other candidates ...

The Springer-Praxis Popular Astronomy programme covers the latest observations, techniques and discoveries in astronomy, astrophysics and cosmology, selecting key topics designed to fire the imagination of keen astronomers everywhere. Many of the topics selected for titles in this programme are refreshingly new, and away from the accepted mainstream of titles published in this area. Topics inc...

that the dynamic psychology of human behaviour has a part to play in the interpretation and understanding of that behaviour, and an important function in solving its inter-personal inter-national and social aberrations, then we must take note of this growing demand for "popular" knowledge. We must be prepared to put over our knowledge in a way that is helpful and understanding, yet stimulating ...