\input zb-basic \input zb-ioport \iteman{io-port 04201668} \itemau{Bacci, S.; Mato, G.; Parga, N.} \itemti{Dynamics of a neural network with hierarchically stored patterns.} \itemso{J. Phys. A, Math. Gen. 23, No.10, 1801-1810 (1990).} \itemab Summary: We study the dynamics of a strongly diluted and a non-diluted hierarchical model. The first one is solved exactly. The phase diagram and the size of the attraction basins of the fixed points of the dynamics are calculated and their behaviour is compared. \itemrv{~} \itemcc{} \itemut{neural network; dynamics; phase diagram} \itemli{doi:10.1088/0305-4470/23/10/020} \end