20-00 2 20B07 2 20C07 2 20E07 2 20E15 2 20E25 2 20E26 2 20E28 2 20E34,20E36 20E45 2 20F14 2 20F16 2 20F18 2 20F19 2 20F22 2 20F24 2 20F50 2 CC – groups 2 Chernikov groups 2 FC – groups 2 finiteness conditions 2 generalized nilpotent groups 2 generalized soluble groups 2 infinite groups 2