Some examples of DR-indecomposable special fibers of semi-stable reductions over Witt rings
/ Authors
/ Abstract
We answer negatively an open problem of Illusie on the DR-decomposability of the log de Rham complex of the special fiber of a semi-stable reduction over the Witt ring. We also show that E1 degeneration of the Hodge to log de Rham spectral sequence does not imply DR-decomposability of semi-stable varieties.