  This book contains notes of a seminar on Ofer Gabber's work on the etale
cohomology and uniformization of quasi-excellent schemes. His main results
include (cf. introduction) constructibility theorems (for abelian or
non-abelian coefficients), vanishing theorems (e.g. affine Lefschetz),
uniformization for the "prime-to-l alteration topology", rigidity for
non-abelian coefficients, a new proof of the absolute purity conjecture,
duality, etc.
