Dessins d'enfants and Hubbard Trees

We show that the absolute Galois group acts faithfully on the set of Hubbard trees. Hubbard trees are finite planar trees, equipped with self-maps, which classify postcritically finite polynomials as holomorphic dynamical systems on the complex plane. We establish an explicit relationship between certain Hubbard trees and the trees known as ``dessins d'enfant'' introduced by Grothendieck.Comment: 27 pages, 8 PostScript figure

Giving Oral Expression Free Rein : Implications for Diversity of University Hate Speech Code

This paper uses history, law, and First Amendment theory to examine the concepts of political correctness, free speech, and hate speech in a search for a solution of how best to deal with hate speech incidents that occur in the university campus community. The paper notes the American tendency toward tyranny of the majority as noted by Alexis de Tocqueville in the 1830s and then proceeds to examine the double-edged sword of free speech. By guaranteeing freedom of speech we promote the right to shout down ethnic and other minority groups; by providing penalties against those who use it to shout others down we make society less free. This paper suggests a different answer: promote more speech expressed in community meetings conducted in an atmosphere that is safe and encouraging for all to express their views

Foreign direct investment (FDI) and the global food crisis. A study of the Windward Islands' agricultural sector.

Using panel data unit root tests and Johansen Co-integration tests, as well as the Engle-Granger -correction model to test for causality, this study examines the effect of FDI on agriculture sector productivity (x6), market size (x2), macroeconomic performance (x3), infrastructure (x4), competitiveness (x5), financial performance (x7) and governance (x8), in a sample of five Caribbean countries over the period 1970-2006. According to UNCTAD (2008), FDI is defined as investment made from outside of the economy of the investor with the objective of acquiring a lasting interest in or effective control over an enterprise. The results suggest that in general when evidence of causality is observed it runs from FDI to (x4). No causality was detected in either direction for (x2), (x5), (x6) and (x8). However, causality runs from FDI to (x3). A major policy implication of the findings is that the agriculture sector does not impact significantly on the attraction of FDI in these countries.FDI