activity
20042022
most citedMotives for elliptic modular groups

3 citations · 8 across the 14 of their papers we have counts for

collaborators

14 papers

math.AG2022

Tau functions and KP solutions on families of algebraic curves

Takashi Ichikawa

Using abelian differentials and periods of the universal Mumford curve, we study the universal expression and asymptotic behavior of tau functions defined for stably degenerating f…

math.NT2021

Iterated integrals and unipotent periods on families of marked elliptic curves

Takashi Ichikawa

We describe iterated integrals as unipotent periods on families of marked elliptic curves in terms of multiple zeta values and elliptic multiple zeta values.

math-ph2020

Modular functors with infinite dimensional Hilbert spaces

Takashi Ichikawa

We introduce a notion of generalized modular functors with Hilbert spaces of infinite dimension in general, and show that a generalized modular functor with data of conformal dimen…

math.AG2020

The universal Mumford curve, and its abelian differentials and periods in arithmetic formal geometry

Takashi Ichikawa

We construct the universal Mumford curve of given genus as a family of Mumford curves over the deformation space of degenerate curves in the category of arithmetic formal geometry.…

math.AG2019★ 1 cited

Periods of generalized Tate curves

Takashi Ichikawa

A generalized Tate curve is a universal family of curves with fixed genus and degeneration data which becomes Schottky uniformized Riemann surfaces and Mumford curves by specializi…

math-ph2018★ 1 cited

An explicit formula of the normalized Mumford form

Takashi Ichikawa

We give an explicit formula of the normalized Mumford form which expresses the second tautological line bundle by the Hodge line bundle defined on the moduli space of algebraic cur…