Spin structures in enumerative geometry
Workshop in Leiden, 16-18 June 2025

Overview. The goal of the workshop is to gather different points of view on spin structures, especially from a modular and enumerative geometry perspective. In particular, this includes the following topics:

• FJRW theory;
• Topological recursion of Ω-classes;
• Refinement of invariants according to sign/parity;
• Choice of spin structures in Oh-Thomas formalism (e.g. DT4 invariants);
• Invariants of surfaces of positive genus;
• BKP hierarchy;
• Birationnal geometry of connected components of moduli spaces defined by parity

• Andrei Bud (Goethe-Universität, Frankfurt). title tba
  Abstract: tba
  
  
• Alessandro Chiodo (Sorbonne Université, Paris). title tba
  Abstract: tba
  
  
• Elba Garcia-Failde (Sorbonne Université, Paris). title tba
  Abstract: tba
  
  
• Alessandro Giacchetto (ETH, Zürich). title tba
  Abstract: tba
  
  
• Nick Kuhn (University of Oxford). title tba
  Abstract: tba
  
  
• Melissa Liu (Columbia University, New-York). title tba
  Abstract: tba
  
  
• Sergej Monavari (EPFL, Lausanne). title tba
  Abstract: tba
  
  
• Riccardo Ontani (Imperial College, London). title tba
  Abstract: tba
  
  
• Ran Tessler (Weizmann Institute, Tel-Aviv). title tba
  Abstract: tba
  
  
• Markus Upmeier (University of Aberdeen). title tba
  Abstract: tba
  
  

• 13h30-14h30:
• 15h00-16h00:
• 16h30-17h30:

• 9h00-10h00:
• 10h30-11h30:
  Lunch
• 13h30-14h30:
• 15h00-16h00:
• 16h30-17h30:

• 9h00-10h00:
• 10h00-11h00:
• 11h30-12h30: