\input zb-basic \input zb-ioport \iteman{io-port 06074441} \itemau{Zou, Shaofen; Chen, Yuming; Ma, Jianfu; Wu, Jianhong} \itemti{Delay for the capacity-simplicity dilemma in associative memory attractor networks.} \itemso{Neural Netw. 29-30, 37-51 (2012).} \itemab Summary: We consider the issue of how a simple network with delayed feedback can exhibit complex but desired dynamical behaviors for memory storage and retrieval. We discuss the simplicity-capacity dilemma arising from the requirement of both large capacity and easy implementation in additive networks. We then propose a novel approach based on signal processing delay and show that the interaction of delay, feedback and refractoriness in a simple inhibitory network of three neurons can generate mathematically trackable coexisting periodic patterns. Therefore, a simple and small network with delayed feedback can process a large amount of information, and time lag in our biological or artificial neural nets is useful for information processing. How the connection topology of a large network enhances the network's capacity for memory storage and retrieval seems to be an interesting task for the future. \itemrv{~} \itemcc{} \itemut{multistability; associative memory; periodic pattern; signal delay; inhibitory loop} \itemli{doi:10.1016/j.neunet.2012.01.007} \end