Combinatorial Anabelian Geometry and Related Topics,
RIMS workshop, June 29 - July 3, 2020



Organisers: Yuichiro Hoshi (RIMS), Shinichi Mochizuki (RIMS), Ivan Fesenko (Univ. Nottingham), Arata Minamide (RIMS)

This workshop is one of four workshops of special RIMS year "Expanding Horizons of Inter-universal Teichmüller Theory".

Combinatorial anabelian geometry concerns the reconstruction of scheme- or ring-theoretic objects from more primitive combinatorial constituent data. In this sense, it is closely philosophically related to inter-universal Teichmüller theory.

The purpose of the present workshop is to expose fundamental, introductory aspects of combinatorial anabelian geometry, as well as more recent developments related to the Grothendieck-Teichmüller group and the absolute Galois groups of number fields and mixed-characteristic local fields.

The workshop will also treat results concerning the "resolution of nonsingularities" of hyperbolic curves over mixed-characteristic local fields, such results are closely related to combinatorial anabelian geometry over mixed-characteristic local fields.

Invited speakers:

Kazumi Higashiyama (RIMS, Kyoto Univ., Japan),
Yuichiro Hoshi (RIMS, Kyoto Univ., Japan),
Emmanuel Lepage (IMJ, Paris, France),
Arata Minamide (RIMS, Kyoto Univ., Japan),
Shinichi Mochizuki (RIMS, Kyoto Univ., Japan),
Shota Tsujimura (RIMS, Kyoto Univ., Japan),
Yu Yang (RIMS, Kyoto Univ., Japan)

RIMS Workshop supported by RIMS and
Symmetries and Correspondences

Venue: Kyoto University,
RIMS (main building),
Room 420

To register to participate, please send an email with your name, position and affiliation to