Conference on Unexpected and Asymptotic Properties of Algebraic Varieties 2023

Conference celebrates Brian Harbourne

August 11-12, 2023 | University of Nebraska-Lincoln

We are pleased to announce a conference to celebrate the many accomplishments of Professor Brian Harbourne. The conference will feature plenary talks by experts in algebraic geometry and commutative algebra as well as shorter talks or posters by recent Ph.Ds. Please register by July 1st.

Contact Alexandra Seceleanu with any inquiries about this conference.


Brian Harbourne stands with arms over his head
Brian Harbourne

Confirmed Speakers

  • Cristiano Bocci (University of Siena) slides
  • Sandra Di Rocco (KTH Stockholm)
  • Eloísa Grifo (University of Nebraska-Lincoln)
  • Elena Guardo (University of Catania) slides
  • Mike Janssen (Dordt University) slides
  • Juan Migliore (University of Notre Dame) slides
  • Uwe Nagel (University of Kentucky) slides
  • Joaquim Roé (Universitat Autònoma de Barcelona) slides
  • Tomasz Szemberg (Pedagogical Institute, Cracow) slides
  • Halszka Tutaj-Gasińska (Jagiellonian University, Cracow) slides


All times Central. All talks take place in 115 Avery Hall.

Friday, August 11

9:00 - 9:15 AM Registration
9:15 - 9:30 AM Opening Remarks
9:30 - 10:20 AM Tomasz Szemberg Through base loci towards positivity
10:30 - 11:00 AM Coffee Break
11:00 - 11:30 AM Joaquim Roé (virtual) On the boundary of the Mori cone of general blowups of the plane
11:40 AM - 12:30 PM Juan Migliore (virtual) Star configurations, and their progenitors and descendants
12:30-2:00 PM Lunch break
2:00 - 2:50 PM Elena Guardo Steiner systems and configurations of points
3:10 - 3:40 PM Coffee Break
3:40 - 4:30 PM Mike Janssen On Symbolic Powers of Ideals
6:00 PM Reception at the home of Sandeep Holay

Saturday, August 12

9:00 - 9:30 AM Sandra Di Rocco (virtual) Relative Polar Geomerty of Algebraic Data
9:40 - 10:10 AM Halszka Tutaj-Gasińska (virtual) Some constructions of unexpected hypersurfaces
10:20 - 11:00 AM Coffee Break
11:00 - 11:50 AM Uwe Nagel Expect to be Surprised: Brian Harbourne's Contributions on Unexpected Properties
12:00 PM - 1:00 PM Poster Session
1:00-2:30 PM Lunch break
2:30 - 3:20 PM Eloísa Grifo A survey of Harbourne's Conjecture 
3:30 - 4:00 PM Coffee Break
4:10 - 5:00 PM Cristiano Bocci Fantastic points and where to find them
5:10 - 5:20 PM Closing Remarks

Poster Presenters

  • Sankhaneel Bisui, Arizona State University, and Thai Than Nguyen, McMaster University, Interpolation-related Bounds
  • Reid Buchanan, Oklahoma State University, Macaulay Coefficients and Decomposing Lex Segments
  • Sebastian Calvo, Pennsylvania State University, The Icosahedral Line Configuration and Waldschmidt Constants
  • Hoai Dao, Oklahoma State University, Resolving powers of the maximal ideal with a hole
  • Lucja Farnik, Pedagogical University of Cracow, Unexpected cones and geproci sets
  • Karthik Ganapathy, University of Michigan, The infinite variable polynomial ring in positive characteristic
  • Allison Ganger and Levi Heath, University of Nebraska, Infinitesimally geproci sets
  • Sean Grate, Auburn University, Betti tables forcing failure of the Weak Lefschetz Property
  • Thiago Holleben, Dalhousie University, Lefschetz properties of squarefree monomial ideals
  • Arvind Kumar, New Mexico State University, On resurgence numbers of cover ideal of graphs
  • Manohar Kumar, Indian Institute of Technology Kaharagpur, Regularity comparison of symbolic and ordinary powers of weighted oriented graphs
  • Nikola Kuzmanovski, University of Nebraska, Generalizations of Macaulay's lex ideal theorem
  • Adam LaClair, Purdue University, Castelnuovo-Mumford regularity of binomial edge ideals
  • Cheng Meng, Purdue University, Multiplicities in flat local extensions
  • Michael Morrow, University of Kentucky, Computing Groebner Bases and Free Resolutions of OI-Modules
  • Ritvik Ramkumar, Cornell University, Cartwright-Sturmfels ideals and their moduli
  • Shahriyar Roshan-Zamir, University of Nebraska, Interpolation in the Weighted Projective Space
  • Naufil Sakran, Tulane University, Unipotent Numerical Semigroups
  • Andrew Soto Levins, University of Nebraska, A Rigidity Theorem for Ext
  • Stephen Stern, University of Nebraska, On Alexander Self-duality
  • Likun Xie, University of Illinois at Urbana-Champaign, On an Instance of the Small Cohen-Macaulay Conjecture
  • Frank Zimmitti, University of Nebraska, Unexpectedness stratified by codimension


  • Susan Cooper, University of Manitoba
  • Alexandra Seceleanu, University of Nebraska-Lincoln
  • Adam Van Tuyl, McMaster University