https://en.wikipedia.org/wiki/Anabelian_geometry Anabelian geometry More recently, Mochizuki introduced and developed a so called mono-anabelian geometry which restores, for a certain class of hyperbolic curves over number fields or some other fields, the curve from its algebraic fundamental group. Key results of mono-anabelian geometry were published in Mochizuki's "Topics in Absolute Anabelian Geometry." Anabelian geometry can be viewed as one of generalizations of class field theory. Unlike two other generalizations ? abelian higher class field theory and representation theoretic Langlands program ? anabelian geometry is highly non-linear and non-abelian.
https://en.wikipedia.org/wiki/Langlands_program Langlands program 4 Current status 4.1 L
