Let $ C$ a point of $ \partial \bar{M}_{g,n}$ , corresponding to a curve with exactly one node $ p$ . Then the normal space of $ \partial \bar{M}_{g,n}$ inside $ \bar{M}_{g,n}$ at $ C$ is given by $ T_p(C_1)\otimes T_p(C_2)$ . Let $ C$ be a singular stable $ n$ -pointed curve of genusRead more