An Additive Basis for the Chow Ring of \bar{M}_{0,2}(P^r,2)

We begin a study of the intersection theory of the moduli spaces of degree two stable maps from two-pointed rational curves to arbitrary-dimensional projective space. First we compute the Betti numbers of these spaces using Serre polynomial and equivariant Serre polynomial methods developed by E. Getzler and R. Pandharipande. Then, via the excision sequence, we compute an additive basis for their Chow rings in terms of Chow rings of nonlinear Grassmannians, which have been described by Pandharipande. The ring structure of one of these Chow rings is addressed in a sequel to this paper.Comment: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA

The Status of Supersymmetry

Supersymmetry searches are about to enter an important new era. With LEP 200 and the Main Injector, they will, for the first time, begin to probe significant regions of the supersymmetric parameter space. There is a real chance that supersymmetry might indeed be found before the advent of the LHC.Comment: Invited talk given at PbarP95, May 9-13, 1995, Fermilab. This summary is intended for experimentalist

On Farber's invariants for simple 2q2q-knots

Let $K$ be a simple $2q$-knot with exterior $X$. We show directly how the Farber quintuple $(A,\Pi,\alpha,\ell,\psi)$ determines the homotopy type of $X$ if the torsion subgroup of $A=\pi_q(X)$ has odd order. We comment briefly on the possible role of the EHP sequence in recovering the boundary inclusion from the duality pairings $\ell$ and $\psi$. Finally we reformulate the Farber quintuple as an hermitian self-duality of an object in an additive category with involution.Comment: v2. Minor reorganization and corrections to final sectio

[Review of] Cora Govers and Hans Vermeulen, eds. The Politics of Ethnic Consciousness

Govers and Vermeulen\u27s book seems to be a timely one, considering the resurgence of inter-ethnic strife that is causing so much misery in many parts of the world, especially since the collapse of the Soviet Union and the end of the cold war. The book, however, is not an expose on the politics of ethnic consciousness. Rather, it is a collection of case studies that address certain aspects of ethnic consciousness. Govers and Vermeulen provide the theoretical context for these studies in the introductory first chapter of the book. Indeed, the book can be usefully divided into two main parts, with the first chapter constituting one part and the rest of the chapters constituting the other