TY - JOUR AU - Becker, Howard TI - Polish group actions: Dichotomies and generalized elementary embeddings JO - Journal of the American Mathematical Society PY - 1998 SP - 397 EP - 449 VL - 11 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-98-00258-6/ DO - 10.1090/S0894-0347-98-00258-6 ID - 10_1090_S0894_0347_98_00258_6 ER -