格罗腾迪克 自述其一生工作

In [SGA4] we defined the étale cohomology, obtaining comparison theorems, finiteness theorems, theorems about the cohomological dimension, the weak Lefschetz theorem. In [SGA5] we obtained duality theorems, the Lefschetz formulas, the formulas of Euler-Poincare, and application of étale cohomology ...