Mark Xavier Shanahan (10/12/1932–7/8/2008)

Xavier Daura 2 , Alan

30epartment of Biophysical Chemistry, University of Groningen, Nijenborgh 4 9747 AG, Groningen, The Netherlands A principal component analysis has been applied on equilibrium simulations of a p-heptapeptide that shows reversibIe folding in a methanol solution. The analysis shows that the configurational space contains only three dense sub-states. These states of relatively low tree energy corre...

Lessons learned from Xavier

Mathematical Logic Xavier

In any model theoretic logic, Beth’s definability property together with Feferman-Vaught’s uniform reduction property for pairs imply recursive compactness, and the existence of models with infinitely many automorphisms for sentences having infinite models. The stronger Craig’s interpolation property plus the uniform reduction property for pairs yield a recursive version of Ehrenfeucht-Mostowsk...

2 Xavier Buff And

We prove the existence of quadratic polynomials having a Julia set with positive Lebesgue measure in three cases: the presence of a Cremer fixed point, the presence of a Siegel disk, the presence of infinitely many (satellite) renormalizations.

In memoriam - Xavier Leverve

scientifi c community, heard of the death of Xavier Leverve last November 7th. Hundreds of colleagues, friends and family gathered for his funeral in Paris, to remember this exceptional man, one of the leading scientists in the fi eld of metabolism and nutrition. Xavier’s interests were quite wide, covering cellular bioenergetics and substrate metabolism, as well as hypoxia/reoxygenation and ac...