3 problems

Consider superstring theory with ground states, including the ground state leading to ten-dimensional space-time, and consider compactification on Calabi–Yau threefolds as a possib…

In superstring theory, consider compactification on a Calabi–Yau 3-fold, and let the translation group contain a four-dimensional subgroup corresponding to the uncompactified direc…

The K3 elliptic genus has a character expansion … Here $N_n$ denotes the coefficient associated with the character $\operatorname{ch}^{Q=0}_{\Delta=n}$ in this expansion. Ooguri's…