Recent content by Johannes86

Does not \int d\xi\ (\xi-\eta)f(\xi)=\int d\xi\ (\xi-\eta)(f_1+\xi f_2)=\int d\xi\ (\xi f_1-\eta f_1+\xi\eta f_2)=f_1+\eta f_2=f(\eta) imply (\xi-\eta)=\delta(\xi-\eta)?