The commutative algebra group has research interests which include algebraic geometry, algebraic and quantum coding theory, homological algebra, representation theory, and K-theory.

## Faculty

Professor **Brian Harbourne** works in commutative algebra and algebraic geometry. He has studied the geometry of rational surfaces, and his recent focus is on Hilbert functions and resolutions of homogeneous ideals defining fat point subschemes of the projective plane.

Assistant Professor **Jack Jeffries** works in commutative algebra. Some of his recent interests include differential operators, local cohomology, positive/mixed characteristic techniques, and applications to neuroscience.

Professor **Tom Marley** is interested in homological algebra over commutative Noetherian local or graded rings. Specifically, he studies finiteness properties of local cohomology, such as Hartshorne's concept of cofiniteness and the Huneke-Hochster conjecture that the set of associated prime ideals of a local cohomology module is finite. In addition, he works on applications of local cohomology to the theory of Hilbert functions and the depths of Rees algebras.

Assistant Professor **Alexandra Seceleanu** is interested in homological problems in local commutative algebra, but also likes to think about graded structures. Her thesis focused on extending lower bounds on ranks of syzygies to the case of certain hypersurface rings in mixed characteristic and separately on studying the Weak Lefschetz property in instances that can be related to the geometry of fat point schemes. She is also interested in computational algebra problems.

Professor **Judy Walker** works in algebraic coding theory. Much of her work uses techniques from number theory, algebraic geometry and graph theory. She has worked with algebraic geometric codes over rings and the relationship between weight measures on these codes and exponential sums. Currently, she studies low density parity check codes, focusing especially on their pseudocodeword structure.

Professor **Mark Walker** works in commutative algebra, algebraic geometry and algebraic K-theory. Recently, much of his work has focused on the geometric and algebraic properties of complete intersections with isolated singularities.

Emeritus Professor **Luchezar Avramov** works on the homological algebra of commutative rings. Recent topics include the structure of ring homomorphisms, finiteness of Andre'-Quillen homology and of Hochschild homology, behavior of infinite resolutions, and the vanishing of Tor and Ext, particularly over complete intersections and Gorenstein rings.

Emeritus Professor **Roger Wiegand** works on the homology and representation theory of local rings: On the homological side, he studies depth properties of tensor products of modules and related questions on the vanishing of Tor. In representation theory he is interested in the classification of rings of finite representation type and questions regarding uniqueness of direct-sum decompositions of modules.

Emeritus Professor **Sylvia Wiegand** involved in an on-going investigation of the rings between a local ring and its completion. She also works in representation theory and on the partially ordered set of prime ideals in Noetherian rings of low dimension.

## Current Graduate Students

Laila Awadalla

Advised by: Tom Marley

Matthew Bachmann

Advised by: Mark Walker

Michael DeBellevue

Advised by: Alexandra Seceleanu and Mark Walker

Taran Funk

Advised by: Tom Marley

Allison Ganger

Advised by: Brian Harbourne

Su Ji Hong

Advised by: Tri Lai

Eric Hopkins

Advised by: Mark Walker

Erica Hopkins

Advised by: Mark Walker and Alexandra Seceleanu

Jake Kettinger

Advised by: Brian Harbourne

Katie Lee

Advised by: Brian Harbourne

Amadeus Martin

Advised by: Mark Walker

Shah Roshan Zamir

Advised by: Alexandra Seceleanu

Andrew Soto Levins

Advised by: Mark Walker

Advised by: Brian Harbourne

## Recent Graduates

Benjamin Drabkin (PhD 2020)

Advised by: Alexandra Seceleanu

Nicholas Packauskas (PhD 2019)

Advised by: Lucho Avramov and Mark Walker

Josh Pollitz (PhD 2019)

Advised by: Lucho Avramov and Mark Walker

Eric Canton (PhD 2018)

Advised by: Mark Walker and Brian Harbourne

Mohsen Gheibi (PhD 2018)

Advised by: Mark Walker and Roger Wiegand

Seth Lindokken (PhD 2018)

Advised by: Mark Walker

Matthew Mills (PhD 2018)

Advised by: Kyungyong Lee

Neil Steinburg (PhD 2018)

Advised by: Tom Marley and Roger Wiegand

Solomon Akesseh (PhD 2017)

Advised by: Brian Harbourne

Brittney Falahola (PhD 2017)

Advised by: Tom Marley

Luigi Ferraro (PhD 2017)

Advised by: Lucho Avramov

John Myers (PhD 2017)

Advised by: Lucho Avramov

Andrew Windle (PhD 2017)

Advised by: Mark Walker

Doug Dailey (PhD 2016)

Advised by: Tom Marley

Becky Egg (PhD 2016)

Advised by: Tom Marley

Jason Lutz (PhD 2016)

Advised by: Luchezar Avramov and Srikanth Iyengar

Peder Thompson (PhD 2016)

Advised by: Mark Walker

Michael Brown (PhD 2015)

Advised by: Mark Walker

Katharine Shultis (PhD 2015)

Advised by: Brian Harbourne and Roger Wiegand

Marcus Webb (PhD 2015)

Advised by: Tom Marley

Zheng Yang (PhD 2015)

Advised by: Lucho Avramov

Jason Hardin (PhD 2014)

Advised by: Mark Walker

Amanda Croll (PhD 2013)

Advised by: Srikanth Iyengar

Annika Denkert (PhD 2013)

Advised by: Brian Harbourne

Courtney Gibbons (PhD 2013)

Advised by: Luchezar Avramov and Roger Wiegand

Michael Janssen (PhD 2013)

Advised by: Brian Harbourne

Xuan Yu (PhD 2013)

Advised by: Mark Walker

Ela Celikbas (PhD 2012)

Advised by: Sylvia Wiegand

Brian Johnson (PhD 2012)

Advised by: Tom Marley