Terry Song's homepage

Terry (Dekun) Song 宋德坤

Pictured in front, on the right

About

I am a PhD student at University of Cambridge working with Dhruv Ranganathan. I'm affliated to Trinity College and supported by the Cambridge Trust.
E-mail: ku.ca.mac@6102sd
CV (updated Dec 2024)

Research

I think about moduli spaces in algebraic geometry, their topology, and how they interact with combinatorics, logarithmic, and tropical geometry. I also have interests in enumerative geometry.
  • The S n -equivariant Euler characteristics of ℳ 1 , n ( ℙ r , d ) joint with Siddarth Kannan [arxiv]. Submitted. [Some talk slides]
  • The dual complex of ℳ 1 , n ( ℙ r , d ) via the geometry of the Vakil--Zinger moduli space, joint with Siddarth Kannan [arxiv]. Submitted.

    • Travels

  • Apr 14 - 18, 2025: Workshop "Enumerative geometry in logarithmic, tropical and real world," Les Diablerets
  • Jul 14 - 25, 2025: SRI in Algebraic Geometry, Fort Collins

    • (Talks I've given are at a different section!)

    Past travels
  • Oct - Nov, 2024: Visiting Melody's group at Brown University
  • Nov 8 - 10, 2024: AGNES + BATMOBILE at Dartmouth; poster
  • Sept 9 - 13, 2024: Workshop on tropical linear spaces at Tübingen; minitalk on weighted Dressians
  • Jul 29 - Aug 2, 2024: Workshop on logarithmic moduli theory at Cambridge
  • Jul 8 - 19, 2024: Simons Center workshop on moduli, Stony Brook. Recordings.
  • Jul 1 - 5, 2024: LMS invited Lectures by Dan Abramovich and co, Imperial College. Notes and recordings.
  • Jun 17 - 21, 2024: INI programme on enumerative geometry and moduli stacks, Cambridge. Recordings.
  • Apr 18 - 19, 2024: GlEN workshop at St Andrews
  • Apr 10 - 12, 2024: BrAG workshop at Sheffield
  • Feb 26 - Mar 1, 2024: 'Panorama of moduli spaces' at Frankfurt. Recordings.
  • Dec 11 - 15, 2023: Stability and enumerative geometry workshop at Oslo
  • Nov 22, 2023: Calf meeting at Cambridge
  • Oct 9 - 13, 2023: Vector bundles and combinatorial algebraic geometry at Frankfurt
  • Sep 14 - 15, 2023: UK Algebraic geometry network conference at Nottingham
  • Jul 3 - 7, 2023: Conference on derived categories, moduli spaces, and counting invariants at Imperial
  • Jun 28 - 30, 2023: GLEN workshop Derived Categories, Hodge theory and Singularities at Sheffield
  • Jun 12 - 16, 2023: Conference 'Arithmetic, Birational Geometry, and Moduli Spaces' in celebration of Dan Abramovich's 60th birthday at Brown
  • Mar 3, 2023: Calf meeting at Nottingham
  • Jan 23 - 27, 2023: Conference 'Structures in Enumerative Geometry' at Sheffield
  • Jan 9 - 13, 2023: Conference 'Quivers, Clusters, Moduli and Stability' in celebration of Alastair King's 60th birthday at Oxford
  • Dec 5 - 7, 2022: Workshop on singularities and mirror symmetry at Glasgow

    • Teaching

    In Lent 2025, I teach the examples classes for Part III Intersection Theory lectured by Alessio with course page here.

    I carry out supervisions (Cambridge's term for small-group problem classes) for undergraduates at Cambridge.

  • Part IA Groups, Rings, and Modules: Lent 2025.
  • Part II Riemann Surfaces: Michaelmas 2023 & Lent 2025.
  • Part II Algebraic Topology: Lent 2024 & Michaelmas 2023.
  • Part II Algebraic Geometry: Lent 2024 & Lent 2023.

    • Talks

  • Apr 11, 2025, ETH Algebraic geometry and moduli seminar: Topology of genus one mapping spaces; slides
  • Jan 17, 2025, Calf seminar: expository talk on genus one stable maps and the Vakil--Zinger moduli space
  • Nov 26, 2024, QMUL tropical combinatorics seminar: A weighted analogue of the Dressian
  • Nov 9, 2024, AGNES Dartmouth: Mini-talk on the dual complex and the Vakil--Zinger moduli space
  • Nov 4, 2024, Research group meeting: expository talk on the rank 2 Dressian and rational tropical curves
  • Sep 10, 2024, Tübingen summer school on tropical linear spaces: Mini-talk on weighted Dressians; expanded talk notes
  • Jun 6, 2024, Internal learning seminar: expository talk on M 0 , n following Petersen
  • Apr 1, 2024, Fanosearch group meeting, Imperial: expository talk on matroid tilings and hyperplane arrangements
  • Feb 2, 2024, Junior geometry seminar, Cambridge: expository talk on the Grothendieck ring of varieties
  • 2023: Peize and I presented parts of Huybrechts - Lehn

    • Personal

    I was born in Harbin and grew up in Beijing. Before Cambridge, I was an undergraduate (2018-22) at St Peter's College, Oxford.

    More
  • Mura Yakerson's YouTube channel "Math-life Balance"
  • When I'm (not) doing maths I like to listen to music. A few groups I follow and feel close to: Dolphy Kick Bebop (prog, improv), Gong Gong Gong ('phantom rhythm,' in their own words), Mong Tong (pysch, Southeast Asian mysticism), Pu Poo Platter, and Sleeping Dogs (both soul, groove, Afrobeat)
  • "The dark heart of our brightness" by Matilde Marcolli