Office: Math 740

Office Phone: 765 49-41956

I am an Assistant Professor at Purdue University. Before coming to Purdue I was a Research Assistant Professor at University of Utah. I obtained my Ph.D in May 2014 at the University of Michigan under the direction of Melvin Hochster. My research interests are in commutative algebra and algebraic geometry.

- Lim Cohen-Macaulay sequences of modules (with Bhargav Bhatt and Melvin Hochster), in preparation.

- Regularity, singularities and h-vector of graded algebras (with Hailong Dao and Matteo Varbaro), submitted.

- Recent applications of p-adic methods to commutative algebra (with Karl Schwede),
*Notices Amer. Math. Soc.*, to appear.

- A Kunz-type characterization of regular rings via alterations (with Karl Schwede), submitted.

- F-signature under birational morphisms (with Thomas Polstra, Karl Schwede and Kevin Tucker),
*Forum Math. Sigma*, to appear.

- Lech's inequality, the Stuckrad-Vogel conjecture, and uniform behavior of Koszul homology (with Patricia Klein, Pham Hung Quy, Ilya Smirnov and Yongwei Yao),
*Adv. Math.*, 347 (2019), 442-472. (Oberwolfach report)

- Singularities in mixed characteristic via perfectoid big Cohen-Macaulay algebras (with Karl Schwede), submitted.

- Cohomologically full rings (with Hailong Dao and Alessandro De Stefani), submitted.

- Regular rings and perfect(oid) algebras (with Bhargav Bhatt and Srikanth Iyengar),
*Comm. Algebra*(special issue dedicated to Gennady Lyubeznik), to appear.

- Maximal Cohen-Macaulay modules over certain Segre products,
*Comm. Algebra*(special issue dedicated to Gennady Lyubeznik), to appear.

- Extended plus closure in complete local rings (with Raymond Heitmann),
*J. Algebra*(special issue dedicated to Craig Huneke), to appear.

- Perfectoid multiplier/test ideals in regular rings and bounds on symbolic powers (with Karl Schwede),
*Invent. Math.*214 (2018), no. 2, 913-955.

- Big Cohen-Macaulay algebras and the vanishing conjecture for maps of Tor in mixed characteristic (with Raymond Heitmann),
*Algebra Number Theory*12 (2018), no. 7, 1659-1674.

- D-module and F-module length of local cohomology modules (with Mordechai Katzman, Ilya Smirnov and Wenliang Zhang),
*Trans. Amer. Math. Soc.*370 (2018), no. 12, 8551-8580.

- F-singularities under generic linkage (with Janet Page, Rebecca R.G., William Taylor and Wenliang Zhang),
*J. Algebra*505 (2018), 194-210.

- Frobenius actions on local cohomology modules and deformation (with Pham Hung Quy),
*Nagoya Math. J.*232 (2018), 55-75.

- The dualizing complex of F-injective and Du Bois singularities (with Bhargav Bhatt and Karl Schwede),
*Math. Z.*288 (2018), no. 3-4, 1143-1155.

- The vanishing conjecture for maps of Tor and derived splinters,
*J. Eur. Math. Soc.*20 (2018), no. 2, 315-338.

- Lech's conjecture in dimension three,
*Adv. Math.*322 (2017), 940-970. (Oberwolfach report)

- Local cohomology of Du Bois singularities and applications to families (with Karl Schwede and Kazuma Shimomoto),
*Compos. Math.*153 (2017), no. 10, 2147-2170.

- F-injectivity and Buchsbaum singularities,
*Math. Ann.*362 (2015), no. 1-2, 25-42.

- Eulerian graded D-modules (with Wenliang Zhang),
*Math. Res. Lett.*21 (2014), no. 1, 149-167.

- A sufficient condition for F-purity,
*J. Pure Appl. Algebra*218 (2014), 1179-1183.

- The category of F-modules has finite global dimension,
*J. Algebra*402 (2014), 1-20.

- Finiteness properties of local cohomology for F-pure local rings,
*Int. Math. Res. Not.*(2014), no. 20, 5489-5509.

- The Frobenius endomorphism and multiplicities,
*Thesis, University of Michigan*(2014).

- Math 45000 Algebra Honors (Fall 2019).
- Math 26500 Linear Algebra (Fall 2018, Spring 2015, Fall 2014).

- Math 7830 Topics in Commutative Algebra: Perfectoid spaces and the homological conjectures (Spring 2018).
- Math 2210 Calculus 3 (Fall 2017, Spring 2016).
- Math 2200 Introduction to Discrete Mathematics (Spring 2017, Fall 2016).
- Math 2250 Differential Equations and Linear Algebra (Fall 2015).

- TA for the course on Fibonacci numbers for Michigan Math and Science Scholars (Summer 2014).
- TA for Math 215 Calculus 3 (Spring 2014, Fall 2013, Fall 2012, Spring 2012).

- Math 116 Calculus 2 (Spring 2011).

- Math 115 Calculus 1 (Spring 2010, Fall 2009).

- Math 105 Data, Functions & Graphs (Spring 2009, Fall 2008).

- Ph.D's Life, with Jingchen Wu, English Crosstalk.

- Go Back to The Past, with Qi Gong, Chinese Crosstalk.