Societal Evolution. A. G. Keller

Laurent Keller

Laurent Keller is a professor at the University of Lausanne, where he directs the Department of Ecology and Evolution. After his PhD in Lausanne, he completed a postdoc with E.O. Wilson at Harvard and then returned to Bern and Lausanne with a special research and teaching grant from the Swiss NSF. He then applied with Nicolas Perrin to share a chair in the Department of Ecology in Lausanne; fol...

Bounded generation of SL ( n , A ) ( after D . Carter , G . Keller , and E . Paige ) Dave Witte

We present unpublished work of D. Carter, G. Keller, and E. Paige on bounded generation in special linear groups. Let n be a positive integer, and let A = O be the ring of integers of an algebraic number field K (or, more generally, let A be a localization OS−1). If n = 2, assume that A has infinitely many units. We show there is a finite-index subgroup H of SL(n, A), such that every matrix in ...

The evolution of societal values compatible with ecological sustainability

Human influences on evolution, and the ecological and societal consequences.

Humans have dramatic, diverse and far-reaching influences on the evolution of other organisms. Numerous examples of this human-induced contemporary evolution have been reported in a number of 'contexts', including hunting, harvesting, fishing, agriculture, medicine, climate change, pollution, eutrophication, urbanization, habitat fragmentation, biological invasions and emerging/disappearing dis...

A stochastic Keller-Segel model of chemotaxis

We introduce stochastic models of chemotaxis generalizing the deterministic KellerSegel model. These models include fluctuations which are important in systems with small particle numbers or close to a critical point. Following Dean’s approach, we derive the exact kinetic equation satisfied by the density distribution of cells. In the mean field limit where statistical correlations between cell...