题目: Spherical derivative and more
报告人: Dr. Shahar Nevo (Bar-Ilan University, Israel)
时间：2011年10月9日 下午13：00-15:00
地点：闵行校区数学楼102报告厅

摘要: We prove that if $\mathcal{F}$ is a family of meromorphic function in a domain $D$ and $\{\rho^\sharp:\rho\in\mathcal{F}\}$ is locally bounded away from zero, then $\mathcal{F}$ is normal. We derive from this result the existence of some universal constant and calculate it. This work is jointly with S. Grahl. Separately we obtain a new formula for the natural logarithm of natural number that generalize the know formula for $\ln 2$.