See also this Youtube channel.

    Amplituhedra and Origami:

  1. Cornell Discrete Geometry and Combinatorics Seminar, Fall 2024 pdf
  2. IAS Combinatorics of Fundamental Physics Workshop, Fall 2024 pdf | video (1hr)

    3. Move-reduced graphs on a torus vs positroid Catalan numbers:

  3. IPAM Workshop II: Integrability and Algebraic Combinatorics, Spring 2024 pdf | video (1hr) | game!

    4. Geometric objects associated to planar bipartite graphs:

  4. IPAM Workshop I: Statistical Mechanics and Discrete Geometry, Spring 2024 pdf | video (1hr)

    5. Introduction to cluster algebras:

  5. IPAM: Geometry, Statistical Mechanics, and Integrability Tutorials, Spring 2024 pdf | video (1hr)

    6. Monotone links in DAHA and EHA:

  6. AIM Workshop "Algebra, geometry, and combinatorics of link homology", Summer 2023 pdf (1hr)
  7. UC Davis Combinatorics Seminar, Spring 2023 pdf (1hr)

    8. Parity duality for the amplituhedron:

  8. SCGP Workshop: Combinatorics and Geometry of Convex Polyhedra, Spring 2023 pdf | video (1hr)

    9. Braid variety cluster structures and 3D plabic graphs:

  9. USC Combinatorics Seminar, Winter 2023 pdf1 | pdf2 (1hr)
  10. AIM workshop "Cluster algebras and braid varieties", Winter 2023 pdf1 | pdf2 (1hr)

    11. Positroids, knots, and q,t-Catalan numbers:

  11. MIT Applied Mathematics Colloquium, Winter 2023 pdf (1hr)
  12. Cornell Oliver Club, Winter 2023 pdf (1hr)
  13. Duke Mathematics Department Colloquium, Winter 2023 pdf (1hr)
  14. Canada-Mexico-USA Conference in Representation Theory, Noncommutative Algebra, and Categorification, Summer 2022 pdf
  15. Open Problems in Algebraic Combinatorics, Spring 2022 pdf | video (1hr)
  16. Stanford Mathematics Department Colloquium, Winter 2022 pdf (1hr)
  17. AIM link homology group, cluster structures seminar (Zoom) Fall 2021 pdf1 | pdf2 (1.5hrs)
  18. AlCoVE 2021 (Zoom), Spring 2021 pdf | video (30min)
  19. Torus Knots Seminar (Zoom), Spring 2021 pdf1 | pdf2 | video (1hr)
  20. ICERM workshop, Brown University (Zoom), Spring 2021 pdf | video (30min)

    21. Ising model, total positivity, and criticality:

  21. FPSAC 2021 (Zoom), Winter 2022 pdf | video (20min)
  22. Oberwolfach Mini-Workshop: Scattering Amplitudes, Cluster Algebras, and Positive Geometries (Zoom), Fall 2021 pdf (1hr)
  23. Harvard CMSA, Combinatorics, Physics and Probability Seminar (Zoom), Fall 2021 pdf (1hr)
  24. CCNY Math Colloquium (Zoom), Fall 2021 pdf (1hr)
  25. Séminaire DIMERS (Zoom), Summer 2021 pdf (1hr)
  26. Positive Geometries in Scattering Amplitudes and Beyond (Zoom), Spring 2021 pdf | video (1hr)
  27. Yale University Clusters and Geometry Seminar (Zoom), Spring 2021 pdf | video (1.5hrs)
  28. UMich Combinatorics seminar (Zoom), Winter 2021 pdf | video (50min)

    29. Symmetries of stochastic colored vertex models:

  29. Dimers in Combinatorics and Cluster Algebras conference (Zoom), Summer 2020 pdf | video (40min)
  30. Russian Integrable Probability Seminar (Zoom), Spring 2020 pdf1 | pdf2 | video (2hrs, in Russian)

    31. Totally positive spaces: topology and applications:

  31. St. Petersburg Geometry and Combinatorics Seminar (Zoom), Spring 2020 pdf1 | pdf2 | video (2hrs, in Russian)
  32. MIT Thesis Defense, Spring 2019 pdf (1hr)

    33. Higher secondary polytopes and regular plabic graphs:

  33. Southern California Discrete Mathematics Symposium 2020, USC, Winter 2020 pdf (1hr)
  34. 10th Discrete Geometry and Algebraic Combinatorics Conference, South Padre Island, Fall 2019 pdf (1hr)

    35. Regularity theorem for totally nonnegative flag varieties:

  35. MIT Infinite Dimensional Algebra Seminar, Spring 2019 notes pdf (2hrs)

    36. Ising model and total positivity:

  36. University of Toronto Special Colloquium, Fall 2018 pdf | video (1hr)
  37. UIUC Integrability and Representation Theory seminar, Fall 2018 pdf (1hr)
  38. MIT Integrable Probability seminar, Fall 2018 pdf (1hr)
  39. UCLA Colloquium, Fall 2018 pdf (1hr)
  40. UMich combinatorics seminar, Fall 2018 pdf (1hr)

    41. Plabic graphs and zonotopal tilings:

  41. FPSAC 2018, Summer 2018, pdf (25min)
  42. UC Berkeley, Math 270 "Hot topics in algebra" (guest lecture), Fall 2017

    43. The totally nonnegative Grassmannian is a ball:

  43. MIT, 18.218 "Topics in combinatorics" (guest lecture), Spring 2018

    44. R-systems:

  44. AMS Joint Meeting, San Diego, CA, Spring 2018 pdf (20min)
  45. Université du Québec à Montréal, LaCIM seminar, Fall 2017 pdf (1hr)

    46. Zamolodchikov periodicity and integrability:

  46. UCLA algebra seminar, Fall 2018 pdf (1hr)
  47. Infinite Analysis 17, Osaka, Japan, Fall 2017 lecture 1 pdf and video (1hr) | lecture 2 pdf (1hr)
  48. UC Berkeley combinatorics seminar, Fall 2017 pdf (1hr)
  49. UMich combinatorics seminar, Fall 2017 pdf (1hr)
  50. AMS Sectional Meeting, Hunter College, New York, NY, Spring 2017 pdf (20min)
  51. Brandeis combinatorics seminar, Spring 2017 pdf (1hr)
  52. UMN combinatorics seminar, Fall 2016 pdf (1hr)
  53. AMS Sectional Meeting, Bowdoin College, Brunswick, ME, Fall 2016 pdf (20min)
  54. MIT combinatorics seminar, Spring 2016 pdf (1hr)

    55. Weak Separation, Pure Domains and Cluster Distance:

  55. FPSAC 2016, Summer 2016 pdf (poster)

    56. The symmetry and Schur expansion of dual stable Grothendieck polynomials:

  56. MIT combinatorics seminar, Fall 2015 pdf (1hr)

    57. Existence of a persistent hub in the convex preferential attachment model:

  57. 11th International Vilnius Conference on Probability and Mathematical Statistics, Summer 2014 pdf (20min)

    58. Manifolds associated to simple games:

  58. Algebraic topology and its applications seminar at Moscow State University, Spring 2014 pdf (1hr, in Russian)
  59. St.Petersburg A. D. Aleksandrov geometry seminar, Fall 2013 pdf (1hr, in Russian)