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From topological data analysis to Floer homology and beyond

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BGSMath Course
From January 19, 2026
to January 23, 2026

Location: IMUB and SYMCREA-UPC

Introduction

The goal of this course is to explore two contemporary topics at the intersection of Geometry and Topology. One of these is Topological Data Analysis (TDA), a field that applies topological methods to the study of structured datasets. TDA provides a toolkit for revealing hidden patterns, capturing geometric features, and uncovering shape-related properties of data, making it a valuable methodology across diverse scientific and analytical disciplines.

The other focus of the course is Floer Homology, a powerful algebraic framework for detecting fixed points and periodic orbits in dynamical systems. The course also introduces the theory of persistence modules, an emerging area that combines topology with representation theory motivated by TDA. Its connections with geometry and analysis will be explored, with emphasis on applications to symplectic topology.

The course will be structured in two parts, each of independent interest yet deeply interconnected. It will take place over five days.

lecturers

Carles Casacuberta

Universitat de Barcelona

Carles Casacuberta is Chair of Geometry and Topology at the Universitat de Barcelona and internationally recognised for his research in homotopy theory, category theory, and their applications to algebra and geometry. He has published extensively on localisation and homological methods, forging important connections between categorical and topological approaches. Casacuberta is a member of the Institut d’Estudis Catalans and served as President of the Societat Catalana de Matemàtiques, reflecting his leadership in the Catalan scientific community. His work has strengthened algebraic topology in Spain, opened bridges towards applications in topological data analysis (TDA), and fostered collaborations with new research communities, both nationally and internationally.

Urs Frauenfelder

Universität Augsburg

Urs Frauenfelder is Professor of Mathematics at the University of Augsburg and internationally recognised for his work in symplectic and contact topology, Floer theory, and Hamiltonian dynamics. His contributions include fundamental advances in symplectic homology, leafwise intersections, and variational methods in geometry and dynamics. Frauenfelder has held academic positions in Switzerland and Korea, building strong bridges between European and Asian communities in symplectic geometry. He is widely regarded as a leading figure in Floer theory and its applications, shaping the field and fostering international collaborations in geometry and dynamical systems.

Eva Miranda

Universitat de Politècnica de Catalunya – CRM

Eva Miranda is Chair of Geometry and Topology and ICREA Academia awardee at the Universitat Politècnica de Catalunya, and Gauss Professor at the Academy of Sciences of Göttingen. She is internationally recognised for her research at the intersection of symplectic and Poisson geometry, dynamical systems, celestial mechanics, and, more recently, computation. She has pioneered the study of singular symplectic and Poisson structures and uncovered undecidability phenomena in fluid dynamics. Miranda has received prestigious international distinctions such as the François Deruyts Prize, an FSMP Chaire d’Excellence, the 2023 Hardy Lectureship, and the Friedrich Wilhelm Bessel Research Award. Her influential work and leadership have shaped modern approaches to symplectic geometry and broadened its applications across mathematics and physics.

Ignasi Mundet i Riera

Universitat de Barcelona – CRM

Ignasi Mundet i Riera is Professor of Geometry and Topology at the Universitat de Barcelona and member of CRM. He is internationally recognized for his research in gauge theory and moduli spaces. He has contributed important results on stability conditions, principal bundles, group actions and the Hitchin–Kobayashi correspondences.He is currently the Director of the Institut de Matemàtiques de la Universitat de Barcelona (IMUB), where he plays a leading role in promoting excellence and internationalisation in mathematics research. His leadership is positioning IMUB as a hub connecting mathematics with new scientific communities and fostering international collaborations.

Leonid Polterovich

Tel Aviv University

Leonid Polterovich is Chair of Mathematics at Tel Aviv University and internationally recognised for his research in symplectic topology, dynamical systems, and functional analysis. He has introduced influential notions such as symplectic quasi-states and Poisson bracket invariants, which have profoundly reshaped the field. Polterovich is the author of several landmark monographs, a member of the Academia Europaea, and a recipient of distinguished honours including the Erdős Prize and the EMS Prize. His scholarship and vision have built new bridges across mathematical disciplines and inspired a global community of researchers in geometry and dynamics.

CONTENT

Each foundational subject is covered in two sessions of 1 hour and 30 minutes, followed by a joint discussion session (1 hour).

Day

Session

Content

Lecturer(s)

Monday & Tuesday – Foundations

Topological Data Analysis

Topological Data Analysis – Filtered simplicial complexes; persistent homology, persistence modules, barcodes

Carles Casacuberta (UB)

Morse Theory

Introduction to Morse functions, critical points; construction of Morse complexes

Ignasi Mundet (UB - CRM)

Introduction to Symplectic Geometry

Local and global aspects of symplectic manifolds; symplectomorphisms, contact structures

Eva Miranda (UPC - CRM)

Joint Q&A and Discussion Session (Tuesday, 1 hour)

With: Casacuberta, Miranda, Mundet

Wednesday to Friday – Advanced Topics

Floer Homology

■ Session 1: Action functionals, Floer’s equation, compactness, index theory

■ Session 2: Definition and construction of Hamiltonian Floer homology

■ Session 3: Applications to symplectic topology and the Arnold conjecture

Urs Frauenfelder (Universität Augsburg)

Persistence Modules in Symplectic Topology

■ Session 1: Hofer’s metric, Hamiltonian Floer-homological persistence modules

■ Session 2: Symplectic Banach-Mazur distance, symplectic homology as persistence modules for Liouville domains

■ Session 3: Stability theorems for Hamiltonian diffeomorphisms and Liouville domains, applications

Leonid Polterovich (Tel Aviv University)

Friday – Final Joint Discussion Session

A closing session to reflect on the course, explore connections between TDA and symplectic topology, and highlight open problems and future research directions. With all lecturers

BIBLIOGRAPHY

  • Audin, M., and Damian, M. (2014). Morse Theory and Floer Homology. Universitext. Springer, London.
  • Chazal, F., de Silva, V., Glisse, M., and Oudot, S. (2016). The Structure and Stability of Persistence Modules. Springer Briefs in Mathematics. Springer, Cham.
  • Floer, A. (1988). Morse theory for Lagrangian intersections. Journal of Differential Geometry, 28(3), 513–547.
  • McDuff, D., and Salamon, D. (1998). Introduction to Symplectic Topology. Oxford Graduate Texts in Mathematics, vol. 27. Oxford University Press, Oxford.
  • Oudot, S. (2015). Persistence Theory: From Quiver Representations to Data Analysis. Mathematical Surveys and Monographs, vol. 209. American Mathematical Society, Providence, RI.
  • Polterovich, L., Rosen, D., Samvelyan, K., and Zhang, J. (2020). Topological Persistence in Geometry and Analysis. University Lecture Series, vol. 74. American Mathematical Society, Providence, RI.
  • Salamon, D. (1999). Lectures on Floer homology. In: Symplectic Geometry and Topology (Park City, UT, 1997). IAS/Park City Mathematics Series, vol. 7. American Mathematical Society, Providence, RI, pp. 143–229.

LIST OF PARTICIPANTS

Name Institution

 

For inquiries about this event please contact the Scientific Events Coordinator Ms. Núria Hernández at nhernandez@crm.cat​​

 

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