Seminar on Cohomology Theories (Working Seminar in Mathematics and Statistics I & II, MATH 666/7. 2003-04). Back to Goren’s webpage Goal: Grothendieck topologies and etale and crystalline cohomologies; applications to zeta functions and the Weil conjectures; de Rham cohomology and its variation in families; calculation of cohomology groups. References we'd like to understand: Mumford/Picard groups