TY - JOUR AU - V. G. Zvyagin TI - The degree of compact multivalued perturbations of Fredholm mappings of positive index and its application to a~certain optimal control problem JO - Fundamentalʹnaâ i prikladnaâ matematika PY - 2015 SP - 65 EP - 87 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FPM_2015_20_2_a4/ LA - ru ID - FPM_2015_20_2_a4 ER -