This workshop, sponsored by AIM and the NSF, will bring together experts from different areas in mathematics related to applications of the Bochner technique, including Riemannian geometry, complex geometry, representation theory, and geometric flows.

The Bochner technique is a foundational tool in differential geometry which provides a deep link to topology. Recent advances include new connections to representation theory with applications to vanishing results for Betti and Hodge numbers, the resolutions of the Nishikawa conjecture, projectivity and rational connectedness results for Kähler manifold, or new Kodaira-Bochner formulae. The aim of the workshop is to both push the boundaries of these areas as well as strengthen the interaction among experts in different areas. Utilizing the versatility of the Bochner technique is a key component of the workshop. The workshop is meant to bring together leading experts as well as aspiring new researchers from all areas related to the Bochner technique.

The main topics for this workshop are

(1) Vanishing results and applications to topology and geometric flows

(2) Representation theoretic aspects and symmetric spaces

(3) The curvature operator of the second kind

(4) Nonlinear Kodaira-Bochner formulae and their applications

The goal of this workshop is to discuss the papers Étale metaplectic covers of reductive group schemes'' by Yifei Zhao andWhat are the extended pure inner forms of a cover?''by Zhao and Luozi Shi. We will focus on how they fit into other recent research related to covers of reductive groups and their role in the Langlands program.

Date: May 20, 2026 (Wednesday) at 4PM (UK time)

Speaker: Prof. Ben Green, University of Oxford, UK

Topic: The polynomial Freiman-Ruzsa conjecture

About the Talk: Prof. Ben Green is an internationally renowned mathematician whose work spans additive combinatorics, number theory, and related areas of analysis. He is widely known for groundbreaking contributions such as the Green–Tao theorem on arithmetic progressions in the primes, and has received numerous prestigious awards in recognition of his influence on modern mathematics. In this talk, he will discuss the polynomial Freiman–Ruzsa conjecture, outlining its background, key ideas, and recent resolution, as well as its role in shaping current research in additive combinatorics. See the blog announcement of this talk for more details.

Link to join: At the scheduled time, join the talk here. No registration is required.

Alternatively, you can open Teams -> Calendar -> Meet now -> Join with an ID, and then enter Meeting ID: 369 493 884 995 096 and Passcode: kB9Qf3wK

We are excited to announce that GTA Philadelphia 2026, our 11th annual graduate student conference in geometry, topology, and algebra, will take place from Friday May 29th to Sunday May 31st, 2026 at Temple University in Philadelphia.

The plenary speakers are:

Tye Lidman (North Carolina State University)

Cary Malkiewich (Binghamton University)

Naomi Sweeting (Princeton University)

Alex Wright (University of Michigan)

Graduate students have the opportunity to give ~20 minute research talks. We have NSF funding to support US-institution-based student participants, and particularly encourage members of underrepresented groups to apply.

We will also feature a panel discussion surrounding math collaboration.

You can register here! Participants who require funding should register by April 9th, 2026. Titles and Abstracts must also be submitted by April 9th, 2026.

For more information please see our website: GTA Philadelphia 2026.

If you have any questions, please feel free to email us at [email protected].

The Cascade Topology Seminar (CTS) is a semi-annual gathering of topologists, broadly defined, from the Pacific Northwest US and Southwestern Canada.

Invited speakers: • Richard Canary (University of Michigan) • Orsola Capovilla-Searle (Oregon State University) • Chad Giusti (Oregon State University) • Ryan Grady (Montana State University)

Short talks from early-career researchers: • Lia Buchbinder (Washington State University) • Jonathon McCollum (Oregon State University) • Jackson Morris (University of Washington) • Connor Progin (Oregon State University) • Elizabeth Thompson (Washington State University) • Alex Waugh (University of Washington)

The conference honours the work of John F. (Rick) Jardine, a professor at the University of Western Ontario. Over his more than 40 year career, Rick has made foundational contributions to homotopy theory, K-theory, and topological data analysis, in particular shaping the current landscape of homotopical algebra.

Homotopy limits and colimits are a fundamental tool in homotopy theory, with applications to topology, geometry, and algebra. The event is aimed at graduate students, postdocs, and early-career researchers who want to learn more about this topic.

See the website for more details.

A conference to celebrate and promote research advances of 2SLGBTQI (2-spirited, Lesbian, Gay, Bisexual, Transgender, Queer, Intersex) mathematicians specialising in algebraic geometry, arithmetic geometry, commutative algebra, and number theory.

The conference “Regensburg GAP days 2” takes place in Regensburg on 27-29 July 2026.

This conference aims to bring together early career researchers in geometric group theory, arithmetic geometry and analysis of PDEs, who will have the opportunity to present their own results.

In mostly parallel sessions, we will provide a stimulating environment for collaboration and scientific interaction between young participants and senior speakers, the latter being:

• Mireille Soergel, TU Berlin
• Anitha Thillaisundaram, Lund University
• Naomi Andrew, Laboratoire de Mathématiques d’Orsay
• Katharina Müller, Bundeswehr Universität München
• Eugenia Rosu, Leiden University
• Oihana Garaialde Ocaña, University of the Basque Country
• Lea Boßmann, FAU Erlangen-Nürnberg
• Céline Grandmont, Sorbonne Université & Inria
• Dorothee Knees, Universität Kassel
• Elke Wolf, Hochschule München

In addition to the mathematical presentations, we will also feature a lecture on gender studies in academic contexts and two career panels.

Everyone is welcome to participate! Limited funding for travel and accommodation is available. The deadline for contributed talks and financial support is April 30, 2026.

On the occasion of 40+ years after the seminar paper of Gross--Zagier, we bring together experts to deliver lectures on a broad range of topics connected with the Gross-Zagier formula, its generalizations, related future directions, and other works that it has inspired.

The conference Moduli and Friends II will take place at the Simion Stoilow Institute of Mathematics of the Romanian Academy (IMAR), Bucharest, during the week 24-28 August 2026.

This conference is focused on topics related to moduli spaces, including configuration spaces, hyperplane arrangements, homological representations and geometric aspects of quantum invariants. The goal is to bring together researchers from different domains under the general umbrella of "moduli spaces" and to encourage the discovery of new connections between these areas. It is a successor to the conference "Moduli and Friends", which took place in September 2023. For more details, see the conference website: https://sites.google.com/view/moduliandfriends2

Registration is open until 10 August 2026 or until the maximal number of participants is reached. We have (limited) funding to cover accommodation costs. If you would like to request funding for accommodation, please register by the earlier deadline of 15 June 2026.

Invited speakers include:

• Takuro Abe (Rikkyo University)
• Enrique Artal Bartolo (Universidad de Zaragoza)*
• Karin Baur (Ruhr-Universität Bochum)*
• José Ignacio Cogolludo Agustín (Universidad de Zaragoza)
• Adrian Diaconu (University of Minnesota)
• Olivia Dumitrescu (University of North Carolina at Chapel Hill)
• Louis Funar (Université Grenoble Alpes)
• Pierre Godfard (University of North Carolina at Chapel Hill)
• Rinat Kashaev (Université de Genève)
• Aaron Landesman (Harvard University)*
• Ishan Levy (Institute for Advanced Study)
• Erik Lindell (University of Copenhagen)
• Gwénaël Massuyeau (Université Bourgogne Europe)
• Rosa Maria Miró-Roig (Universitat de Barcelona)
• Motohico Mulase (University of California, Davis)
• Jun Murakami (Waseda University)
• Sam Nariman (Purdue University)
• Ralf Schiffler (University of Connecticut)
• Andreas Stavrou (University of Chicago)
• Ulrike Tillmann (University of Oxford / Isaac Newton Institute, Cambridge)
• Christine Vespa (Aix-Marseille Université)

[*=to be confirmed]

Organisers:

• Cristina Anghel (Université Clermont Auvergne, France / IMAR, Romania)
• Anca Măcinic (IMAR, Romania)
• Martin Palmer (IMAR, Romania)
• Arthur Soulié (CNRS - Université Caen Normandie, France)

The Annual International Conference of the Georgian Mathematical Union was established in 2010 and has been held traditionally at Batumi Shota Rustaveli State University. Batumi is the city of Georgia and the capital of the Autonomous Republic of Adjara. It is located along the coast of the Black Sea in the southwest region of Georgia. In accordance with recent developments, the conference has been conducted in a hybrid format since 2021. The purpose of the conference is to bring together mathematicians from various fields to present their original research results and provide opportunities to establish new connections within the fields of pure and applied mathematics, as well as science, engineering, and technology. The conference also provides valuable networking opportunities for you to meet great personnel in these fields.

The conference sections: Algebra and Number Theory; Differential and Integral Equations, and Their Applications; Geometry and Topology; Logic, Language, Artificial Intelligence; Mathematical Education and History of Mathematics; Mathematical Logic and Discrete Mathematics; Mathematical Modeling and Numerical Analysis; Theoretical Physics; Probability Theory and Statistics, Financial Mathematics; Real and Complex Analysis.

The aim of the summer school is to bring together early career researchers working in motives (in a broad sense) and neighbouring areas (including but not limited to algebraic geometry and number theory), who want to learn more about the subject and its applications.

The event will consist of four mini-courses. There will be an introductory course:

• Introduction to motives (Alexander Vishik);

and three topic-focused courses on the following themes:

• Motives in algebraic geometry and moduli theory (Victoria Hoskins);
• Applications of motives to number theory and periods (Francis Brown);
• Introduction to (motivic) tensor-triangular geometry (Martin Gallauer).

We will also feature a handful of contributed research talks from participants.

We kindly thank our sponsors for supporting this event:

• Heilbronn Institute for Mathematical Research;
• UKRI/EPSRC Additional Funding Programme for Mathematical Sciences;
• Foundation Compositio Mathematica;
• K-Theory Foundation.

Please share this opportunity with potentially interested students and postdocs.

The application deadline for the Heidelberg Laureate Forum (HLF) 2026 is Feb 11, 2026. See https://www.heidelberg-laureate-forum.org/ for details.

The HLF offers a rare opportunity for students, PhD candidates, and postdocs in mathematics and computer science to spend a week interacting with Abel Prize, Fields Medal, Turing Prize, ACM Prize in Computing, IMU Abacus Medal and Nevanlinna Prize laureates, as well as with other outstanding international early-career mathematicians and computer scientists from around the world, and a variety of distinguished guests. The program includes lectures, workshops, panel discussions, networking events, and more. All local expenses (hotel and meals) are covered and an option to apply for travel funding exists if needed.

Participating in an HLF is a wonderful opportunity in many ways.

Conference in honor of Alexander Kechris, focusing on Descriptive Set Theory and its applications to other fields of mathematics.

For more details on the workshop see https://www.mfo.de/www/activity/2646 .

Applications to participate in the Oberwolfach workshop can be submitted through the following form:

https://forms.gle/E9X7Z6m6xomndBjH8 .

The deadline for full consideration is 18 January 2026.

This workshop aims to bring together experts in the field to share their recent results on cutting-edge topics. Key topics include homological stability for Hurwitz spaces and the stacky perspective on counting problems. The workshop will also cover motivic approaches to counting and the new challenges of generalizing classical results to the wild case. We encourage participants to discuss ways to unify these ideas for further development.

Keywords: Hurwitz spaces (Homological stability), Malle's conjecture (for function fields), Rational points of stacks, Brauer-Manin obstruction (for stacks), Wild Galois extensions of function fields and power series fields (counting results, moduli spaces), Motivic counting of Galois extensions.

This event is part of the special year "Arithmetic, Homotopy, and Geometry 2027-28".