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Algecom usually happens twice a year.
AlGeCom Committee:
AlGeCom XXVII Date: Saturday April 11, 2026
AlGeCom XXVII Date: Saturday April 11, 2026
Location: At Purdue University. Talks will be in 150 N University Ave, room MA 175. Coffee and posters will be in the lobby outside the lecture hall.
Location: At Purdue University. Talks will be in 150 N University Ave, room MA 175. Coffee and posters will be in the lobby outside the lecture hall.
Google map with pin on the conference building: here
The speakers will be
Christin Bibby (LSU)
Christine Berkesch (UMN)
Eloísa Grifo (UNL)
Eamon Quinlan-Gallego (UIC)
Local Organizers (questions related to Algecom XXVII):
Local Organizers (questions related to Algecom XXVII):
ALGECOM is partially funded by a grant from the National Science Foundation, which provides limited support for students and postdocs to offset the cost of attendance. Everyone should apply by filling out the registration form below and indicating their interest in financial support (and we appreciate early applications). Funding decisions will be made shortly thereafter.
ALGECOM is partially funded by a grant from the National Science Foundation, which provides limited support for students and postdocs to offset the cost of attendance. Everyone should apply by filling out the registration form below and indicating their interest in financial support (and we appreciate early applications). Funding decisions will be made shortly thereafter.
Funding decisions will be made by Feb 28. New registrants can still request funding, and we will try to accommodate requests but cannot guarantee it.
Important Note: (in case we can offer reimbursement)
Important Note: (in case we can offer reimbursement)
The NSF conference grant requires the use of a US carrier. In addition, if you intend to purchase an itinerary that is a non-direct return flight to the conference, i.e., a multi-city flight or use of a stopover (this does not include regular connections), you must provide a comparable direct return flight in order to be reimbursed.
PLEASE READ this statement here for detailed instructions on what must be done to get reimbursed.
There will be a poster fair; you can sign up (in the registration form) to present a poster!
There will be a poster fair; you can sign up (in the registration form) to present a poster!
Recommended Parking: UPDATED!!!
Recommended Parking: UPDATED!!!
The parking structure closest to MATH is University Street Garage (50 yards).
It appears that parking there is free, subject to the mild conditions below in italic that I was sent from Parking Facilities (and which come down to a) park on level 2 or higher; not in ADA or other marked spots):
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There appears to be no events affecting University St. Garage on April 11. Please inform your guests that vehicles must be parked forward in the garage parking spaces. They need to avoid any spaces marked Reserved or ADA unless they have a displayed ADA placard. If a vehicle is parking in the ParkMobile meter spaces, payment is required for the time period parked as these are enforced 24 hours.
The ParkMobile meter spaces are located on the 1st floor and posted with the green ParkMobile sign and a zone location. Any other space not marked Reserved or ADA is free parking within the garage.
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IF for some reason University Street Garage should be closed:
The most effective parking is achieved by obtaining online a $5 parking A-license for the day (see here for the instructions ) and then parking in the garage called "PGU" on the map here ; this garage (garages are in burgundy color on the map) is next to the math building (which is slightly Southeast from the garage and called "MATH" on any campus map). This garage needs an A-parking license.
An alternative is the Grant Street Parking Garage located at 120 N. Grant Street, West Lafayette, IN 47906 across from the Purdue Memorial Union. In that garage you apparently pay $1 per hour. The MATH buildning is due West from the Grant Street Garage.
Lodging:
Lodging:
A block of rooms has been reserved at the
Hampton by Hilton West Lafayette
160 Tapawingo Drive, IN, 47906,
(765) 269-8000
under the keyword "algecom". Anyone staying there will have to pay the hotel directly (the price is 149/night plus tax, but this agreement expires March 10) even if you expect that you will be reimbursed later. The hotel is about 20 minutes walking from the conference room.
Here is the... Booking Link.
Schedule:
Schedule:
(All times are in the Eastern Time Zone)
Talks will be in room MATH 175. Coffee and posters will be in the lobby outside the lecture hall.
(MATH is the tallest bulding (12 floors) on campus, MA175 is on ground level. Find the "breezeway" (the passage on ground level that goes East-West underneath the math building, and look out for the big glass doors on the South and on the North side. You want to enter the North doors).
9:00-9:30am Coffee and Registration
9:00-9:30am Coffee and Registration
9:30-10:30am: Christin Bibby (LSU)
9:30-10:30am: Christin Bibby (LSU)
Title: Fiber bundles of toric arrangements
Abstract: We present a combinatorial analysis of fiber bundles of generalized configuration spaces on connected abelian Lie groups and discuss topological consequences. These bundles are akin to those of Fadell-Neuwirth for configuration spaces, and their existence is detected by a combinatorial property of an associated finite partially ordered set. Of particular focus is the case of a toric arrangement: a finite collection of codimension-one subtori in a complex torus. If the intersection pattern of the subtori satisfies the combinatorial condition of supersolvability, the complement of the toric arrangement sits atop a tower of fiber bundles. This structure provides insight into topological invariants of these toric arrangement complements, including the homotopy groups, cohomology, and topological complexity. Based on joint work with Daniel C. Cohen and Emanuele Delucchi.
10:30-11:00am Coffee Break
10:30-11:00am Coffee Break
11:00-12:00am: Eloísa Grifo (UNL)
11:00-12:00am: Eloísa Grifo (UNL)
Title: Embedded deformations
Abstract: In this talk, we will discuss what embedded deformations are, where to find them, and how they might relate to certain homological tools. This is joint work with Benjamin Briggs, Josh Pollitz, and Mark E Walker.
12:00-1:30pm: Lunch
12:00-1:30pm: Lunch
1:30-2:30pm: Christine Berkesch (UMN)
1:30-2:30pm: Christine Berkesch (UMN)
Title: The toric algebra-geometry correspondence
Abstract: There is a well-established correspondence between the geometry of projective varieties and the algebra of standard graded polynomial rings. Multigraded polynomials have even more structure. Recent work has led to new frameworks for leveraging geometry (including toric geometry and symplectic geometry) to understand multigraded algebra. I will give a survey of the history and recent progress.
2:30-3:00pm Coffee Break
3:00-4:00pm:Eamon Quinlan-Gallego (UIC)
3:00-4:00pm:Eamon Quinlan-Gallego (UIC)
Title: The b-function of monomial ideals in positive characteristic
Abstract:: Given an ideal in a polynomial ring over the complex numbers, its b-function as introduced by Budur-Mustață-Saito is a subtle invariant of singularities that detects, among other things, its log canonical threshold. In this talk I will describe a positive characteristic analogue of this invariant, and I will show that the b-function of monomial ideals is characteristic-independent, as long as the prime is picked to be large enough.
4:00-5:30pm Poster Fair (hopefully with coffee)
posters:
Anakin Dey: Algebraic Complexity in Determinantal and Pfaffian Ideals
Ariana Chin: Zamolodchikov Periodic Cluster Algebras
Allan Bickle: Intersecting Families of 3-sets
Duy Phan: A symmetric rule for equivariant Schubert calculus of columns
Yupeng Li: Shellability of the quotient order on lattice path matroids
Hsin-Chieh Liao: Combinatorics of Leray models for permutahedral varieties
Dawei Shen: The ABCT Variety V(3,n) is a Positive Geometry
Elizabeth Xiao: A Hopf algebra on nonplanar binary forests
Aniketh Sivakumar: The multiplicity sequence of monomial ideals
Nutan Nepal: Inverse Kazhdan–Lusztig Polynomials of Matroids
Natalie Chlopecki: Infinite Matrix Schubert Varieties are Cohen-Macaulay
Fuxiang Yang: On the syzygies of virtually linear ideals
6:00pm-??? Dinner will be pizza and hosted at the Swansons, 312 Jefferson Drive, West Lafayette. This is a 15 minute walk from the lecture hall; doors at the Swansons will open at 5:45.
From the Mathematics Building: exit on the Eastern side (away from the parking garage and University Avenue, toward Purdue Memorial Union), walk North towards Elliott Hall. At Elliott circle, turn about 70 degrees to the right and walk East with Elliott Hall on your left. Keep going straight, past Hovde Hall, past the Engineering Fountain, keep going straight, under a walkway between two buildings, which brings you to Northwestern Avenue. Cross Northwestern Avenue towards the parking garage there, but don't go into the garage, instead go a bit left and walk between the garage and the building. The first street you encounter is Hayes Street. Turn north (=to your left) on Hayes Street. Walk north 6 blocks until Hayes ends at the high school field. Turn right onto Meridian, walk one block, then turn left onto Grant Street, and in one block turn right onto Jefferson Drive.
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