A Removable Singularity Theorem for Local Homeomorphisms Stephen AgardAlbert Marden Indiana University Mathematics Journal 1971 text pdf 10.1512/iumj.1971.20.20038 10.1512/iumj.1971.20.20038 en Indiana Univ. Math. J. 20 (1971) 455 - 461 state-of-the-art mathematics http://iumj.org/access/