TY - JOUR AU - E. R. Avakov AU - A. V. Arutyunov TI - Inverse function theorem and conditions of extremum for abnormal problems with non-closed range JO - Sbornik. Mathematics PY - 2005 SP - 1251 EP - 1269 VL - 196 IS - 9 UR - http://geodesic.mathdoc.fr/item/SM_2005_196_9_a0/ LA - en ID - SM_2005_196_9_a0 ER -