2 problems

Transverse-distance conjecture. The transverse distance between the D3-brane probe and the $E_n$ 7-branes is proportional to $\operatorname{vol}(V_2)$ in the local Calabi–Yau three…

Let $X$ be a CalabiYau $5$-fold. The type I topological string on $X$ is the unoriented topological $B$-model with its open-string sector, whose gauge theory has structure group…