The Stacks Project (an open source textbook and reference work on algebraic geometry)

https://stacks.math.columbia.edu/

GW (Greater (George) Washington) Topology Seminar

https://rheapalakbakshi.com/gw-topology-seminar/

Online Cluster Algebra Seminar (OCAS)

https://paginas.matem.unam.mx/ocas/

note(as of Feb.17, 2021): The mailing list is out of order. You should directly contact the organizer(s), in order to get emails and get password(s) for the zoom sessions and past talks.

Center for Quantum Structures in Modules and Spaces
(모듈과 공간의 양자구조 연구센터)

http://qsms.math.snu.ac.kr/

Celebratio Mathematicae

https://celebratio.org/

interesting stories of great mathematicians. run by MSP (who runs journals like Geometry & Topology, ...)

KIAS Horizon (webzine)

https://horizon.kias.re.kr/

Somewhat obsolete parts of this website:

[myresearch] : This is supposed to be an informal research statement for my research, but I never really updated..

[hosted] : This lists some lecture series I hosted while I was at KIAS, with the links to the lecture videos. Unfortunately, KIAS stopped servicing the recorded videos (what a shame!) at some point, so this webpage is not much of use anymore.

Nice videos

for the paper "Quantum geometry of moduli spaces of local systems and representation theory" by A.B. Goncharov and L. Shen, arXiv:1904.10491

lecture videos by A. B. Goncharov, at IHES : [1] [2] [3] [4]

  • a very nice introduction to Fock-Goncharov-Shen's moduli spaces, quantization, and representation theory, which are related to much of my own research

Mathnet Korea

https://www.youtube.com/user/TheMathnetkorea/videos

  • 2010, lectures on 'indefinite integrals' and 'Geometry' by professor Hwang, Jun-Muk (황준묵) (KIAS then, IBS-CCG now)
    '기하학으로의 초대' / 대수적 함수의 부정적분. 영상 (by Mathnet Korea) : [1] [2]
    - Wonderful overview of (part of) 17c mathematics to 19c mathematics. In Korean! aimed at undergraduate students in math.

KAOS Science (Korean) (카오스 사이언스)

https://www.youtube.com/c/KAOSscience/videos

  • '고차원 비유클리드 기하학으로의 초대', 황준묵 교수 (행사: 2018 봄 카오스 강연 '모든 것의 수다') + 패널토론 (이준엽 교수, 오성진 교수)
    [1] [2] [3] [4] [5] [6]
    - 대중강연

Simons Center for Geometry and Physics (youtube channel : 사이먼스 센터)

https://www.youtube.com/c/SimonsCenterforGeometryandPhysics

  • James Simons - Origin of Chern-Simons (2011-Jul-28)
    https://www.youtube.com/watch?v=8VipIKLg6-k
    A beautiful talk.. I learned about characteristic classes, Chern classes, and the Chern-Simons stuff.

  • Ben Davison - Motivic DT-invariants for the one loop quiver with superpotential (2011-Dec-13)
    https://www.youtube.com/watch?v=an136Kt6oqg
    I think I learned something..

  • Pierrick Bousseau - 10/1/2020 - Skein algebras from higher genus mirror symmetry (2020-Oct-1)
    https://www.youtube.com/watch?v=wvbDET7nffg
    about paper 2009.02266. This is where the positivity of the bracelets bases of the Kauffman bracket skein algebras of 4-punctured sphere and of once-punctured torus is proved for the first time in the literature. Used the scattering diagrams and broken lines (i.e. mirror symmetry), but seems quite different to me from Davison-Mandel (and Gross-Hacking-Keel-Kontsevich)

  • Sean Keel - Mirror Symmetry Made Easy (2012-May-15)
    https://www.youtube.com/watch?v=CldVBxgp67o
    about Gross-Hacking-Keel's work. theta functions etc. I think I learned something by this video..

Institute for Advanced Study (youtube channel)
https://www.youtube.com/user/videosfromIAS

KIAS, School of Mathematics (youtube channel) (고등과학원 수학부)
https://www.youtube.com/channel/UCqScab2zbWJpRxkw1KUTcew/

Talk(s) by Bousseau

Some more by Hacking or Keel

by Dennis Sullivan

by Serre

by June Huh

  • June Huh: Hard Lefschetz Properties and Hodge-Riemann relations (I) (2016-Nov-18, Harvard)
    https://www.youtube.com/watch?v=R0ehzWqvAbI
    I couldn't understand everything, but the understandable part was already valuable. I watched it because I finally got interested in Lefschetz property..

some more by Mandel

  • Travis Mandel (Oklahoma) (2021-May-05, Algebraic Geometry @ Nottingham)
    https://www.youtube.com/watch?v=DTEWSyEe-Vw
    title is "Quantum theta bases for quantum cluster algebras". talk about his work with Davison. Quite elementary (and introductory) explanations. Great talk! Not so much into details, but he points out some crucial points of his work. Good to get a bird's-eye view.

Centre de recherches mathématiques - CRM
https://www.youtube.com/c/Centrederecherchesmath%C3%A9matiquesCRM

Conferences