Communications in Number Theory and Physics

Volume 6 (2012)

Number 1

Contents

Symmetries of K3 sigma models

Matthias R. Gaberdiel, Stefan Hohenegger, and Roberto Volpato

pp. 1-50

Anomalies and the Euler characteristic of elliptic Calabi–Yau threefolds

Antonella Grassi and David R. Morrison

pp. 51-127

Feynman graph integrals and almost modular forms

Si Li

pp. 129-157

A new look at one-loop integrals in string theory

Carlo Angelantonj, Ioannis Florakis, and Boris Pioline

pp. 159-201

A second-order differential equation for the two-loop sunrise graph with arbitrary masses

Stefan Müller-Stach, Stefan Weinzierl, and Raphael Zayadeh

pp. 203-222