# Justin Chen

I am a mathematics graduate student at the
University of California, Berkeley
(since fall 2012). My primary research interest is commutative algebra; secondary interests
include algebraic geometry and combinatorics. My advisor is
David Eisenbud.

I received a B.S. in Math from Purdue University, where I first learned commutative
algebra from Bernd Ulrich.

You can reach me at "jchen" AT "math.berkeley.edu". My CV can be found
here.

### Papers (on arXiv)

Flat maps to and from Noetherian rings, arXiv:1711.04958

Infinite prime avoidance, arXiv:1710.05496

Surjections of unit groups and semi-inverses, arXiv:1710.05492

Mono: an algebraic study of torus closures, arXiv:1710.04614

Closed points on schemes, arXiv:1708.06494

Numerical Implicitization for Macaulay2 (joint with J. Kileel), arXiv:1610.03034, code available at GitHub

Invertible sums of matrices, arXiv:1603.06696

Matroids: A Macaulay2 package, arXiv:1511.04618, code available at GitHub

Graded irreducible modules are irreducible (joint with Y. Kim), arXiv:1508.07518

### Teaching

Berkeley prelim workshop, 2015 - present

Math 250A, fall 2017
Math 113, fall 2017
Math 113, spring 2017
Math 54, spring 2016
Math 54, fall 2014
Math 1B, summer 2014
Math 1A, spring 2014
Math 53, fall 2013
Math 16B, summer 2013
Math 1B, spring 2013
Math 1A, fall 2012

Office hours for Math 113: Tuesday 11 am - 3 pm, Wednesday 2 pm - 7 pm, Friday 11 am - 12 pm in 959 Evans

Office hours for Math 250A: Tuesday 2 pm - 3 pm, Wednesday 2 pm - 4 pm in 959 Evans