Alexander Perry
Department of Mathematics
Columbia University
Office: 600 Mathematics
Email: aperry@math.columbia.edu
I am an NSF postdoc at Columbia, working in algebraic geometry.
Previously, I was a graduate student at Harvard.
I coorganize the 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).
Preprint.

Noncommutative homological projective duality.
Preprint.

Hochschild cohomology and group actions.
Preprint.

Intersections of two Grassmannians in P^{9}
(with L. Borisov and A. Căldăraru).
J. Reine Angew. Math. (to appear).

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