Amplitudes and Algebraic Geometry

The ESI program Amplitudes and Algebraic Geometry aims to develop new mathematical paradigms for the fundamental interactions of nature by bringing together physicists working on scattering amplitudes and mathematicians with expertise in real, complex, tropical and computational algebraic geometry. The program features several mini-courses, two one-week topical workshops, as well as two weeks with a light program to enable collaborations among the participants.

Schedule (see below for details of topics):

Week 1, Feb 16-20: Mini-Courses I
Week 2, Feb 23-27: Light program (approx. one talk per day)
Week 3, Mar 2-6: Mini-Courses II
Week 4, Mar 9-13: Workshop I
Week 5, Mar 16-20: Light program (approx. one talk per day)
Week 6, Mar 23-27: Workshop II

Mini-Courses I. Expected lecturers include:

Melissa Sherman-Bennet: Amplituhedra
Bernd Sturmfels: Kinematic Varieties
Lorenzo Tancredi: Feynman Integrals

Mini-Courses II. Expected lecturers include:

Francis Brown: Introduction to Motivic and Mellin periods
Daniele Dorigoni: Modular Forms and AdS/CFT
James Drummond: Cluster Algebras
Samuel Grushevsky: Theta Functions and Moduli Spaces

Workshop I: Algebra and combinatorics of amplitudes, is co-organized by Thomas Lam, Erik Panzer, and Anastasia Volovich. Topics covered include: cluster algebras, amplituhedra and surfacehedra, tropical geometry, as well as positive and binary geometry.

Workshop II: Mathematical structures of amplitudes, is co-organized by Axel Kleinschmidt, Martin Raum, and Leila Schneps. It focusses on the mathematical properties of Feynman and string amplitudes. Topics covered include: Feynman/string integrals, their differential equations, (co-)homology theories and intersection numbers; computational aspects of periods, Hodge theory, theta functions, Siegel modular forms, and moduli spaces of curves and abelian varieties.

Funded by the European Union (ERC, MaScAmp, 101167287 and UNIVERSE PLUS, 101118787). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.

Feb. 16, 2026
09:00 — 09:20
Registration
09:20 — 09:30
Welcome and information
09:30 — 10:45
10:45 — 11:15
Coffee break
12:30 — 14:15
Lunch break
14:15 — 15:30
Melissa Sherman-Bennett (UC Davis)
Amplituhedra I
Recording Slides

Crash course on the totally nonnegative Grassmannian

15:30 — 16:00
Coffee break
16:00 — 16:45
Q & A: Kinematic Varieties
Feb. 17, 2026
09:30 — 10:45
Bernd Sturmfels (MPI MIS, Leipzig)
Kinematic Varieties II:
10:45 — 11:15
Coffee break
12:30 — 14:15
Lunch break
14:15 — 15:30
Melissa Sherman-Bennett (UC Davis)
Amplituhedra II
Recording Slides

Amplituhedron basics and big questions

15:30 — 16:00
Coffee break
16:00 — 16:45
Q & A: Feynman Integrals
Feb. 18, 2026
09:30 — 10:45
10:45 — 11:15
Coffee break
12:30 — 12:45
Group picture
12:45 — 14:15
Lunch break
14:15 — 15:30
Melissa Sherman-Bennett (UC Davis)
Amplituhedra III
Recording Slides

Combinatorics and geometry for m=1,2

15:30 — 16:00
Coffee break
16:00 — 16:45
Q & A: Amplituhedra
Feb. 19, 2026
09:30 — 10:45
10:45 — 11:15
Coffee break
12:30 — 14:15
Lunch break
14:15 — 15:30
Melissa Sherman-Bennett (UC Davis)
Amplituhedra IV
Recording Slide

Techniques for higher m

15:30 — 16:00
Coffee break
16:00 — 16:45
Anna-Laura Sattelberger (MPI-MiS Leipzig)

Math-physics communication

Feb. 20, 2026
09:30 — 11:00
Problem session

Kinematic Varieties and Feynman Integrals

11:00 — 11:30
Coffee break
11:30 — 12:15
Problem session

Amplituhedra

12:15 — 23:59
Lunch break and free afternoon
Feb. 23, 2026
09:00 — 09:30
Registration
09:30 — 10:30
Introductory Session
10:30 — 11:30
12:00 — 13:30
Lunch break
14:30 — 15:00
Coffee break
Feb. 24, 2026
10:30 — 11:30
12:00 — 13:30
Lunch break
14:30 — 15:00
Coffee break
15:00 — 15:15
Poster session Cathrin Semper (U of Bonn)
Canonical DEQs and Intersection Matrices
15:15 — 15:30
Poster Session Sven Stawinski (U of Bonn)
Symmetry Relations between Feynman Integrals
15:30 — 15:45
Poster Session Nicolas Alexander Weiss (MPI MIS, Leipzig)
Connection Matrices in Macaulay2
Feb. 25, 2026
10:30 — 11:30
Francesca Zaffalon (MPI MIS, Leipzig)
How to stab a polytope
12:00 — 12:15
Group picture
12:15 — 13:30
Lunch break
14:30 — 15:00
Coffee break
16:00 — 17:00
Livestream UNIVERSE+ seminar

Thomas Lam (University of Michigan): A combinatorial model for higher tropical Grassmannians

Feb. 26, 2026
10:30 — 11:30
Marvin Anas Hahn (Trinity College, Dublin)
Enumerative geometry and integrability
12:00 — 13:30
Lunch break
14:30 — 15:00
Coffee break
Feb. 27, 2026
12:00 — 13:30
Lunch break
14:30 — 15:00
Coffee break
March 2, 2026
09:00 — 09:20
Registration
09:20 — 09:30
Welcome and information
09:30 — 10:45
Daniele Dorigoni (Durham U)
Modular Forms and AdS/CFT, I
10:45 — 11:15
Coffee break
11:15 — 12:30
Samuel Grushevsky (Stony Brook U, New York)
Theta Functions and Moduli Spaces, I
14:15 — 15:00
Q & A Daniele Dorigoni (Durham U)
15:00 — 15:30
Coffee break
15:30 — 16:45
James Drummond (U Southampton)
Cluster Algebras, I
March 3, 2026
09:30 — 10:45
Daniele Dorigoni (Durham U)
Modular Forms and AdS/CFT, II
10:45 — 11:15
Coffee break
11:15 — 12:30
Samuel Grushevsky (Stony Brook U, New York)
Theta Functions and Moduli Spaces, II
14:15 — 15:30
James Drummond (U Southampton)
Cluster Algebras, II
15:30 — 16:00
Coffee break
16:00 — 16:30
Q & A Samuel Grushevsky (Stony Brook U, New York)
March 4, 2026
09:30 — 10:45
Daniele Dorigoni (Durham U)
Modular Forms and AdS/CFT, III
10:45 — 11:15
Coffee break
11:15 — 12:30
12:30 — 12:45
Group picture
14:15 — 15:30
Problem Session Daniele Dorigoni (Durham U)
15:30 — 16:00
Coffee break
16:00 — 16:45
Q & A James Drummond (U of Southampton)
March 5, 2026
09:30 — 10:45
10:45 — 11:15
Coffee break
11:15 — 12:30
Samuel Grushevsky (Stony Brook U, New York)
Theta Functions and Moduli Spaces, III
14:15 — 15:30
James Drummond (U Southampton)
Cluster Algebras, III
15:30 — 16:00
Coffee break
16:00 — 16:45
Math-physics communication
March 6, 2026
09:30 — 10:30
Problem Session Samuel Grushevsky (Stony Brook U, New York)
10:30 — 11:15
Coffee break
11:15 — 12:15
Problem Session James Drummond (U of Southampton)
March 9, 2026
09:00 — 09:30
registration
09:30 — 10:30
Simon Telen (MPI MIS, Leipzig)
Toric Amplitudes and Universal Adjoints
10:30 — 10:45
Coffee break
10:45 — 11:45
Veronica Calvo Cortes (MPI MIS, Leipzig)
Positive charts of toric varieties
11:45 — 12:45
Saiei-Jaeyeong Matsubara-Heo (Tohoku U)
Reciprocal A-determinants
12:45 — 14:15
Lunch break
14:15 — 15:15
Clément Dupont (Université de Montpellier)
Positive geometries and canonical forms via mixed Hodge theory
15:15 — 15:45
Coffee break
15:45 — 16:45
Claudia He Yun (Arctic U)
Positive del Pezzo geometry
March 10, 2026
09:00 — 09:30
registration
09:30 — 10:30
10:30 — 10:45
Coffee break
11:45 — 12:45
Livia Ferro: TBA
12:45 — 14:15
Lunch break
14:15 — 15:15
Chaim Even-Zohar (Technion Haifa)
Tilings of the Amplituhedron beyond m=4
15:15 — 15:45
Coffee break
15:45 — 16:45
Tomasz Lukowski: TBA
March 11, 2026
09:15 — 10:15
Michael Borinsky (Perimeter Institute, Waterloo)
Tropical(ized) quantum field theory
10:15 — 10:45
Coffee break
10:45 — 11:45
Yelena Mandelshtam: TBA
11:45 — 12:45
Viktoriia Borovik (MPI MIS, Leipzig)
Graphical Scattering Equations
12:45
Lunch break and free afternoon
March 12, 2026
09:30 — 10:30
Ömer Gürdoğan (U Southampton)
Cluster algebraic structures in Feynman integrals
10:30 — 10:45
Coffee break
10:45 — 11:45
James Drummond: TBA
11:45 — 12:45
Hadleigh Frost: TBA
12:45 — 14:15
Lunch break
14:15 — 15:15
Matteo Parisi (OIST, Okinawa)
Landau Analysis on the Grassmannian
15:15 — 15:45
Coffee break
15:45 — 16:45
Jacob Bourjaily (Penn State U)
Improving Tools for Perturbation Theory
March 13, 2026
09:15 — 10:15
Hannah Tillmann-Morris: TBA
10:15 — 10:45
Coffee break
10:45 — 11:45
Federico Ardila (QMU London)
Combinatorics of the cosmohedron
11:45 — 23:59
Lunch break / free afternoon / departure
March 16, 2026
10:00 — 10:30
introductory session
10:30 — 12:00
Marcus Spradlin: TBA
March 17, 2026
10:30 — 11:30
Carlos Rodriguez (MPI MIS, Leipzig)
Hypergeometric Integrals on a Punctured Riemann Surface
March 18, 2026
10:30 — 11:30
March 19, 2026
10:30 — 11:30
March 20, 2026
10:30 — 11:30
March 23, 2026
09:00 — 09:30
registration
09:30 — 10:30
talk 1: TBA
10:45 — 11:45
talk 2: TBA
11:45 — 12:45
talk 3: TBA
14:15 — 15:15
talk 4: TBA
15:45 — 16:45
talk 5: TBA
March 24, 2026
09:00 — 09:30
registration
09:30 — 10:30
talk 1: TBA
10:45 — 11:45
talk 2: TBA
11:45 — 12:45
talk 3: TBA
14:15 — 15:15
talk 4: TBA
15:45 — 16:45
talk 5: TBA
March 25, 2026
09:15 — 10:15
talk 1: TBA
10:45 — 11:45
talk 2: TBA
11:45 — 12:45
talk 3: TBA
March 26, 2026
09:15 — 10:15
talk 1: TBA
10:45 — 11:45
talk 2: TBA
11:45 — 12:45
talk 3: TBA
14:15 — 15:15
talk 4: TBA
15:45 — 16:45
talk 5: TBA
March 27, 2026
09:15 — 10:15
talk 1: TBA
10:45 — 11:45
talk 2: TBA
11:45 — 12:45
talk 3: TBA
This event has no subevents associated to it.

Organizers

Name Affiliation
Daniele Agostini University of Tübingen
Lara Bossinger Universidad Nacional Autónoma de México
Ruth Britto Trinity College
Johannes Henn Max Planck Institute for Physics
Jianrong Li University of Vienna
Anna-Laura Sattelberger Max Planck Institute for Mathematics in the Sciences
Oliver Schlotterer Uppsala University

Attendees

Name Affiliation
Simonetta Abenda University of Bologna
Niklas Affolter Vienna University of Technology
Ankit Aggarwal TU Wien
Rigers Aliaj DESY Hamburg
Athanasia-Konstantina Angelopoulou Trinity College
Federico Ardila Queen Mary University of London
Konstantin Baune ETH Zürich
Gideon Baur Universität Bonn
Manuel Berger ETH Zurich
Mattia Biancotto Max Planck Institute for Gravitational Physics
Jonathan Boretsky McGill University
Michael Borinsky Perimeter Institute
Viktoriia Borovik Max Planck Institute for Mathematics in the Sciences
Guillaume Bossard CNRS & Ecole Polytechnique, Palaiseau
Jacob Bourjaily The Pennsylvania State University
David Broadhurst The Open University
Johannes Broedel ETH Zürich
Francis Brown University of Oxford
Nero Budur KU Leuven
Annika Burmester Bielefeld University
Veronica Calvo Cortes Max Planck Institute for Mathematics in the Sciences
Livia Campo University of Vienna
Sérgio Carrôlo Max Planck Institute for Physics
Ana-Maria Castravet University of Versailles Saint-Quentin
Türkü Özlüm Çelik Max Planck Institute, Dresden
Vsevolod Chestnov University of Oxford
Emiel Claasen Max Planck Institute for Gravitational Physics
Lucas Dauger Université de Jussieu
Claire de Korte Max Planck Institute for Mathematics in the Sciences
Eric D'Hoker University of California, Los Angeles
Sandra Di Rocco KTH Stockholm
Daniele Dorigoni Durham University
James Drummond University of Southampton
Clément Dupont Université de Montpellier
Nick Early Institute for Advanced Study
Benjamin Enriquez Institut de Recherche Mathématique Avancée
Chaim Even-Zohar Technion Haifa
Livia Ferro University of Hertfordshire
Claudia Fevola INRIA Saclay
Stefan Fredenhagen University of Vienna
Hadleigh Frost Institute for Advanced Study
Jens Funke Durham University
Herbert Gangl Durham University
Alheydis Geiger Max Planck Institute for Mathematics in the Sciences
Alessandro Georgoudis Queen Mary University of London
Bruno Gimenez-Umbert University of Southampton
Zachary Greenberg Max Planck Institute for Mathematics in the Sciences
Samuel Grushevsky Stony Brook University
Ömer Gürdoğan University of Southampton
Marvin Anas Hahn Trinity College
Luke Hamilton University of Oxford
Paul Heslop Durham University
Henrik Johansson Uppsala University
Deepak Kamlesh Max Planck Institute for Mathematics
Dani Kaufman Max Planck Institute for Mathematics in the Sciences
Adam Keilthy Trinity College
Jung-Wook Kim CERN
Axel Kleinschmidt Max Planck Institute for Gravitational Physics
Albrecht Klemm University of Sheffield
Joris Koefler Max Planck Institute for Mathematics in the Sciences
Christian Krattenthaler University of Vienna
Thomas Lam University of Michigan
Craig Larkin University of Edinburgh
Sangmin Lee Korea Institute for Advanced Study
Franca Lippert Universität Bonn
Tomasz Lukowski University of Hertfordshire
Rourou Ma University of Science and Technology of China
Sara Maggio Universität Bonn
Abhiram Mamandur Kidambi Max Planck Institute for Mathematics in the Sciences
Yelena Mandelshtam University of Michigan
Marcella Manivel University of Minnesota
Lionel Mason University of Oxford
Antonela Matijasic Johannes-Gutenberg Universität Mainz
Saiei-Jaeyeong Matsubara-Heo Tohoku University
Elia Mazzucchelli Max Planck Institute for Physics
Andrew McLeod University of Edinburgh
Ulysse Mounoud Université de Montpellier
Sergey Mozgovoy Trinity College
Christoph Nega Albert-Einstein-Institute
Simone Noja University of Bari
Erik Panzer University of Oxford
Georgios Papathanasiou National and Kapodistrian University of Athens
Matteo Parisi Okinawa Institute of Science and Technology
Dmitrii Pavlov Max Planck Institute for Physics
Enrico Perron Cabus Uppsala University
Anaelle Pfister Max Planck Institute for Mathematics in the Sciences
Eric Pichon-Pharabod Max Planck Institute for Mathematics in the Sciences
Sebastian Pögel University of Zurich
Andrzej Pokraka University of Amsterdam
Maria Polackova University of Edinburgh
Jean-Luc Portner University of Oxford
Lizzie Pratt University of California, Berkeley
Prashanth Raman Max Planck Institute for Physics
Martin Raum Chalmers University of Technology
Claudia Rella Institut des Hautes Etudes Scientifiques
Niall Robertson Trinity College
Carlos Rodriguez Max Planck Institute for Mathematics in the Sciences
Michele Santagata National Taiwan University
Michael Schlosser University of Vienna
Leila Schneps CNRS Paris
Oliver Schnetz Friedrich-Alexander Universität Erlangen-Nürnberg
Florian Seefeld University of Southern Denmark
Cathrin Semper Universität Bonn
Didina Serban IPhT Saclay
Emre Sertöz Leiden University
Dawei Shen University of Michigan
Melissa Sherman-Bennett University of California, Davis
Aleksander Shmakov University of Stockholm
Rainer Sinn University of Leipzig
Yoann Sohnle Uppsala University
Peter Spacek Max Planck Institute for Mathematics in the Sciences
Marcus Spradlin Brown University
Sven Stawinski Universität Bonn
Harold Steinacker University of Vienna
Thomas Stone Technische Universität München
Bernd Sturmfels Max Planck Institute for Mathematics in the Sciences
Balazs Szendroi University of Vienna
Lorenzo Tancredi Technical University of Munich
Simon Telen Max Planck Institute for Mathematics in the Sciences
Felix Tellander Trinity College
Ayush Kumar Tewari Radon Institute, RICAM
Hannah Tillmann-Morris King's College London
Jaroslav Trnka University of California, Davis
Bert van Geemen Università degli Studi di Milano
Pierre Vanhove IPhT Saclay
Cristian Vergu The Pennsylvania State University
Anastasia Volovich Brown University
Stefan Weinzierl Johannes-Gutenberg Universität Mainz
Nicolas Alexander Weiss Max Planck Institute for Mathematics in the Sciences
Brandon Williams Heidelberg University
Qinglin Yang Max Planck Institute for Physics
Claudia He Yun The Arctic University of Norway
Francesca Zaffalon Max Planck Institute for Mathematics in the Sciences
Federico Zerbini UNED
Shun-Qing Zhang Max Planck Institute for Physics
Yang Zhang University of Science and Technology of China
Yao-Qi Zhang University of Hertfordshire
Preview of Bernd Sturmfels - Kinematic Varieties I: Massless Particles
Bernd Sturmfels (MPI MIS, Leipzig): Kinematic Varieties I:
Feb. 16, 2026 09:30 — 10:45
Preview of Melissa Sherman-Bennett - Amplituhedra I
Melissa Sherman-Bennett (UC Davis): Amplituhedra I
Feb. 16, 2026 14:15 — 15:30
Preview of Bernd Sturmfels - Kinematic Varieties II: Gram Matrices
Bernd Sturmfels (MPI MIS, Leipzig): Kinematic Varieties II:
Feb. 17, 2026 09:30 — 10:45
Preview of Melissa Sherman-Bennett - Amplituhedra II
Melissa Sherman-Bennett (UC Davis): Amplituhedra II
Feb. 17, 2026 14:15 — 15:30
Preview of Bernd Sturmfels - Kinematic Varieties III: Let's Get Real
Bernd Sturmfels (MPI MIS, Leipzig): Kinematic Varieties III:
Feb. 18, 2026 09:30 — 10:45
Preview of Melissa Sherman-Bennett - Amplituhedra III
Melissa Sherman-Bennett (UC Davis): Amplituhedra III
Feb. 18, 2026 14:15 — 15:30
Preview of Bernd Sturmfels - Kinematic Varieties IV: Lines in 3-Space
Bernd Sturmfels (MPI MIS, Leipzig): Kinematic Varieties IV:
Feb. 19, 2026 09:30 — 10:45
Preview of Melissa Sherman-Bennett - Amplituhedra IV
Melissa Sherman-Bennett (UC Davis): Amplituhedra IV
Feb. 19, 2026 14:15 — 15:30
Preview of Zachary Greenberg - Classifying bounded ratios on cluster algebras with U-variables
Zachary Greenberg (MPI MIS, Leipzig): Classifying bounded ratios on cluster algebras with U-variables
Feb. 23, 2026 10:30 — 11:30
Preview of Francesca Zaffalon - How to stab a polytope
Francesca Zaffalon (MPI MIS, Leipzig): How to stab a polytope
Feb. 25, 2026 10:30 — 11:30
Preview of Marvin Anas Hahn - Enumerative geometry and integrability
Marvin Anas Hahn (Trinity College, Dublin): Enumerative geometry and integrability
Feb. 26, 2026 10:30 — 11:30
Preview of Daniele Dorigoni - Modular Forms and AdS/CFT, I
Daniele Dorigoni (Durham U): Modular Forms and AdS/CFT, I
March 2, 2026 09:30 — 10:45
Preview of Samuel Grushevsky - Theta Functions and Moduli Spaces, I
Samuel Grushevsky (Stony Brook U, New York): Theta Functions and Moduli Spaces, I
March 2, 2026 11:15 — 12:30
Preview of James Drummond - Cluster Algebras, I
James Drummond (U Southampton): Cluster Algebras, I
March 2, 2026 15:30 — 16:45
Preview of Daniele Dorigoni - Modular Forms and AdS/CFT, II
Daniele Dorigoni (Durham U): Modular Forms and AdS/CFT, II
March 3, 2026 09:30 — 10:45
Preview of Samuel Grushevsky - Theta Functions and Moduli Spaces, II
Samuel Grushevsky (Stony Brook U, New York): Theta Functions and Moduli Spaces, II
March 3, 2026 11:15 — 12:30
Preview of James Drummond - Cluster Algebras, II
James Drummond (U Southampton): Cluster Algebras, II
March 3, 2026 14:15 — 15:30
Preview of Daniele Dorigoni - Modular Forms and AdS/CFT, III
Daniele Dorigoni (Durham U): Modular Forms and AdS/CFT, III
March 4, 2026 09:30 — 10:45
Preview of Francis Brown - Introduction to Motivic and Mellin periods, I
Francis Brown (U of Oxford): Introduction to Motivic and Mellin periods, I
March 4, 2026 11:15 — 12:30
At a glance
Type:
Thematic Programme
When:
Feb. 16, 2026 — March 27, 2026
Where:
ESI Boltzmann Lecture Hall
Organizer(s):
Daniele Agostini (U Tübingen)
Lara Bossinger (UNAM, Oaxaca)
Ruth Britto (Trinity College, Dublin)
Johannes Henn (MPP, Munich)
Jianrong Li (U of Vienna)
Anna-Laura Sattelberger (MPI MIS, Leipzig)
Oliver Schlotterer (Uppsala U)