He had a long association with the American Mathematical Society being Vice-President in 1919, Colloquium lecturer in 1920 when he lectured on Dynamical Systems, he edited the Transactions of the American Mathematical Society from 1921 to 1924 and was President from 1925 to 1926.
Siya ay may isang mahabang association sa mga Amerikanong matematiko Kapisanan ay Vice-President sa 1919, Colloquium lektor sa 1920 kung kailan siya lectured sa Dynamical Systems, siya edited ang mga transaksyon ng mga Amerikanong matematiko Society 1921-1924 at Pangulo ay 1925-1926.