On Convergent Diffusions: The Densities and the Conditioned Processes Thomas Liggett Indiana University Mathematics Journal 1971 text pdf 10.1512/iumj.1971.20.20024 10.1512/iumj.1971.20.20024 en Indiana Univ. Math. J. 20 (1971) 265 - 279 state-of-the-art mathematics http://iumj.org/access/