# Dingxin Zhang’s homepage

I am interested in algebra, algebraic topology, algebraic number theory and algebraic geometry.

## Some papers

- (with T.-J. Lee) A-hypergeometric systems and relative cohomology (pdf)
- The Monsky-Washnitzer topos (pdf)
- Degeneration of slopes (pdf)
- (with Xi Chen and Xuanyu Pan) Automorphism and Cohomology II: Complete Intersections. arXiv:1511.07906
~~A Lefschetz (1,1) type theorem for homology groups of nonsingular varieties~~(whoops, not available yet)

## Some notes

Here are some notes of mine that might be useful for other people. Please let me know if you find any error.

- Composing power series
- Cheat sheet on D-modules
- Krasner’s lemma
- Artin–Hasse exponential
- Projective duality
- Yukawa coupling (B-side)
- Le théorème de monodromie (d’après Brieskorn)
- Kihel’s Theorem B for quasi-Stein domains
- Dwork’s analytic continuation theorem revisited
- Completed de Rham cohomology of formal power series
- What is Dwork’s conjecture on meromorphy? This is now Daqing Wan theorem
- Negativity of the horizontal subbundle
- Thomason-Trobaugh via Neeman
- An example of a smooth surface with nonreduced Picard

## Other stuff

Séminaire Cocktail de S.-C. Wong at ZJU • ??? • D-modules • Frobenii • Some papers • Graduate students • Mental disorder • Happy me • Professor J. M. Starr (My Ph.D advisor) • Hodge theory seminar with Professor C. Schnell (2016) • TeX Frequently Asked Questions • Showoff

## Coordinates

Dingxin Zhang

Email me

20 Garden St.

Room 109

Cambridge, MA 02138