Diagonal Ising susceptibility: elliptic integrals, modular forms and Calabi-Yau equations

M. Assis, S. Boukraa, S. Hassani +3

We give the exact expressions of the partial susceptibilities ${\chi }_d^{(3)}$ and ${\chi }_d^{(4)}$ for the diagonal susceptibility of the Ising model in terms of modular forms and Calabi-Ya…