Alexander Perry
Email: aperry@math.columbia.edu
Office: Room 600, Department of Mathematics, Columbia University
I am an NSF postdoc at Columbia, working in algebraic geometry.
Previously, I was a graduate student at Harvard.
Columbia Algebraic Geometry Seminar
Curriculum Vitae
Papers

Stability conditions in families and families of hyperkähler varieties
(with A. Bayer, M. Lahoz, E. Macrì, H. Nuer, and P. Stellari).
In preparation. See Arend's Oberwolfach report for a summary
of our results.

Categorical joins (with A. Kuznetsov).
In preparation.

Noncommutative homological projective duality.
Preprint.

Hochschild cohomology and group actions.
Preprint.

Intersections of two Grassmannians in P^{9}
(with L. Borisov and A. Căldăraru). Preprint.

Rationality does not specialize among terminal fourfolds.
Algebra Number Theory (to appear).

Derived categories of GushelMukai varieties
(with A. Kuznetsov). Compositio Mathematica (to appear).

Rational points on twisted K3 surfaces and derived equivalences
(with K. Ascher, K. Dasaratha, and R. Zhou). Brauer Groups and Obstruction Problems: Moduli Spaces and Arithmetic,
Progress in Mathematics, Vol. 320 (2017), 1328.
arXiv version.

Derived categories of cyclic covers and their branch divisors
(with A. Kuznetsov). Selecta Math. (N.S.) 23 (2017), no. 1, 389423.
arXiv version.

Faithfully flat descent for projectivity of modules. Preprint.
Version also
available
at the Stacks Project.

Resolving toric varieties with Nash blowups
(with A. Atanasov, C. Lopez, N. Proudfoot, and M. Thaddeus).
Exp. Math. 20 (2011), no. 3, 288303.
arXiv version.

A conjecture of Evans on sums of Kloosterman sums
(with E. Dummit and A. Goldberg).
Proc. Amer. Math. Soc. 138 (2010), no. 9, 30473056.
Other writing