Notes on cubical hyperresolutions
Some (incomplete) notes on cubical hyperresolutions I wrote down for a seminar
Mircea Mustață ran in Fall 2008 – Winter 2009.
Parts of this also became part of a survey paper I wrote with
Sándor Kovács on Du Bois singularities.
It closely follows parts of the first chapter of
[GNPP].
Generalized divisors and reflexive sheaves on normal varieties
These are some notes I wrote for a class I taught on “Introduction to schemes and cohomology”.
They are based on several papers of Hartshorne on the same topic (although he did it in greater generality,
without the normality hypothesis).
Examples of odd behavior with seminormality
This short document collects counterexamples to plausible but false statements about seminormality.
The examples are not original; I simply gathered them together for convenience.