Abstract:In the study of mixed elliptic motives, we noticed the importance for rational K\pi 1 property on some bar complex arising from mixed elliptic motives. Since its bar complex is some what complicated, it will be useful to consider some easier case, the case for Riemann surfaces.Rational fundamental group of Riemann surface is desribed by Sullivan's old paper, but it seems that rational...
Periods of Calabi-Yau varieties and Gromov-Witten invariantsThe seminar "Geometry, Arithmetic and Differential Equations of Periods" (GADEPs), started in the pandemic year 2020 and its aim is to gather people in different areas of mathematics around the notion of periods which are certain multiple integrals. This is the second GADEPs conference focused on periods and Hodge theory of Calabi-Yau ...