In this paper we show that there is an analytic and computable dynamical system with a hyperbolic sink s such that the basin of attraction of s is not computable. As a consequence, the problem of determining basins of attraction for analytic hyperbolic systems is not, in general, algorithmically solvable. 1 Summary of the paper Dynamical systems are fascinating mathematical objects. They can be...

POWERS, J. B., R. B. FIELDS AND S. S. WINANS. O~wtory and vomeronasal system participation in male hamsters' attraction to ./bmc:/e vaginal secrethms. PHYSIOL. BEHAV. 22(I) 77--84, 1979.~The effects of olfactory (OLF) vomeronasal (VN), or combined deafferentations of male hamsters on their attraction to female hamster vaginal secretions (FHVS) were determined using 2 different attraction tests....