A set S of n points is 2-color universal for a graph G on n vertices if for every proper 2-coloring of G and for every 2-coloring of S with Research was supported by the project 1M0545 of the Ministry of Education of the Czech Republic and by the grant SVV-2010-261313 (Discrete Methods and Algorithms). Viola Mészáros was also partially supported by OTKA grant K76099 and by European project IST-...

4 by 5 Philipp Rosenbaum, Josef Schmitz, Joachim Schmidt, 6 and Ansgar Büschges 4 7 8 1 Biocenter Cologne, Zoological Institute, Department for Animal Physiology, 9 University of Cologne, Zuelpicher Str. 47b, 50674 Cologne, Germany 10 2 Department of Biological Cybernetics, Faculty for Biology, University of Bielefeld, 11 Universitaetsstr. 25, 33615 Bielefeld, Germany 12 3 present address: Vole...

Euler, in addition to Dr. Gaddum, and there are addended commentaries by John Welsh, Andrew Wilson, and Maurice Tainter. Altogether this is a very useful and stimulating section. Walter R. Miles of Yale edits the selected psychomotor measurement methods and includes in this, the longest section in the book, methods for measuring physical work and strength, reaction time, coordinated motor respo...

We study a model of growth and mass production. Firms undertake either product innovations that introduce new luxury goods for the rich; or process innovations that transform existing luxuries into mass products for the poor. A prototypical example for such a product cycle is the automobile. Initially an exclusive product for the very rich, the automobile became affordable to the middle class a...