Seunghun "Shabba" Ryu
E-mail: etalecohomology0@proton.me 

I generally only reply to urgent or important emails. Please don't take it personally if you don't receive a response.

My name is Seunghun Ryu, and I am 20 years old. My research interests include algebraic geometry, class field theory, higher algebra, and categorical logic. I am fully equipped with the background knowledge to discuss my research areas with anyone, as I have deeply studied the foundational papers (e.g. Gaitsgory and Rozenblyum's Derived algebraic geometry, Lurie's Higher Algebra, Lurie's Spectral Algebraic Geometry, NSW's Cohomology of Number Fields, Voevodsky's On motivic cohomology with Z/l coefficients, etc..) in my field. I am looking for a work-from-home job (Because of my social anxiety and asperger). I warmly welcome you to email me.

Linkedin X

Research Works

1. Semiadditivization and Additivization Do Not Reflect Additivity or Stability - Seunghun Ryu (2026)
   Acknowledgements: Thanks to Taeyoon Woo for assisting in organizing the details.

2. Cyclotomic descent and negative Tate twist - Taewan Kim, Seunghun Ryu (2026) 

3. A Localizing (∞, 2)-Category of Small Stable ∞-Categories - Seunghun Ryu (2026) (edited version will be uploaded soon)