This is equivalent to the following result: If all critical points of a rational function lie on a circle in the Riemann sphere (for example, on the real line), then the function maps this circle into ...

Martin Levin, On the Group of Rational Points on Elliptic Curves Over Function Fields, American Journal of Mathematics, Vol. 90, No. 2 (Apr., 1968), pp. 456-462 ...

Thus, ARIMA models with input series are sometimes referred to as transfer function models. In the preceding regression and intervention model examples, the transfer function is a single scale ...