Table of contents

On asymptotic Fermat over the ℤ 2 -extension of ℚ
p. 1-6
Combinatoire des sous-groupes de congruence du groupe modulaire
[Combinatorics of congruence subgroups of the modular group]
p. 7-43
Rigidity, counting and equidistribution of quaternionic Cartan chains
p. 45-69
An L 2 -Cheeger Müller theorem on compact manifolds with boundary
p. 71-116