We introduce a new supervised learning model that is a nonhomogeneous Marko
v process and investigate its properties. We are interested in conditions t
hat ensure that the process converges to a "correct state," which means tha
t the system agrees with the teacher on every "question." We prove a suffic
ient condition for almost sure convergence to a correct state and give seve
ral applications to the convergence theorem. In particular, we prove severa
l convergence results for well-known learning rules in neural networks.