Volume 28 (1999) no. 4

Table of contents

Exponential sums and additive problems involving square-free numbers
p. 591-613
On del Pezzo fibrations
p. 615-639
Distance between components in optimal design problems with perimeter penalization
p. 641-649
A variational approach to bifurcation into spectral gaps
p. 651-674
Some properties of weighted Sobolev spaces in ℝ + d
p. 675-693
Arithmetic properties of the cohomology of Artin groups
p. 695-717
Structural properties of singularities of semiconcave functions
p. 719-740
Renormalized solutions of elliptic equations with general measure data
p. 741-808
Semiregularity, obstructions and deformations of Hodge classes
p. 809-820