Orbifold Euler characteristics of universal cotangent line bundles on ${\bar{M}}_{1,n}$

Y. -P. Lee

A scheme of computing $χ(\mbar_{1,n}, L_1^{\otimes d_1}\otimes ... \otimes L_n^{\otimes d_n})$ is given. Here $\mbar_{1,n}$ is the moduli space of $n$-pointed stable curves of genu…