I am a third year graduate student interested in arithmetic geometry. My advisor is Will Sawin.

Email: caleb.ji@columbia.edu

- Past seminars organized: Étale cohomology and the Weil conjectures, Geometric class field theory Faltings's theorem, intersection theory, FGA
- Expository papers:

Atiyah-Hirzebruch

Bott periodicity

complex multiplication

Cohen-Macaulay rings

cohomological descent

Dold-Kan

J-homomorphism

Mordell-Weil

Riemann surfaces are algebraic

Standard conjectures

Weil for abelian varieties

Weil for curves - Presentations: anabelian geometry, motivic cohomology, Grothendieck
- Teaching/Mentoring: Twoples, DRP, \(\underline{\alpha^*}\)
- Papers (do not reflect current interests)

- seminars at Columbia
- memories of mathematicians:

Michael Atiyah (part 2)

Raoul Bott

Henri Cartan

Shiing-Shen Chern

Jean-Marc Fontaine

Alexander Grothendieck (part 2)

Friedrich Hirzebruch

Maryam Mirzakhani

John Tate

Daniel Quillen - interviews with mathematicians
- math meetings
- math seminars
- study abroad in Moscow or Budapest
- The Green Center (formerly known as the New Alchemists)
- experience organic farming with WWOOF
- a tribute to the educator Félix Carrasquer written by Alexander Grothendieck
- Shafarevich's position by Miles Reid (flyer)