(NsBORNIK ZADA^ I UPRAVNENIJ PO ALGEBRE I NA^ALAM ANALIZA (B/s - (NgRIGORQN(B, (Nl(B.(Nz(B.s; d; (N{EKQN(B, (Nl(B.(Na(B.s; (NeREWANSKIJ GOSUDARSTWENNYJ UNIWERSITETs ((NeREWAN (B:s (NiZD(B-(NWO eREW(B. (NUN(B-(NTA(B,s, 1984)
Keywords: (NmATEMATIKAs