human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "hoplite efficient collective communication for task based distributed systems"
  Abstract: Collective communication systems such as MPI offer high performance group communication primitives at the cost of application flexibility. Today, an increasing number of distributed applications (e.g, reinforcement learning) require flexibility in expressing dynamic and asynchronous communication patterns. To accommodate these applications, task-based distributed computing frameworks (e.g., Ray, Dask, Hydro) have become popular as they allow applications to dynamically specify communication by invoking tasks, or functions, at runtime. This design makes efficient collective communication challenging because (1) the group of communicating processes is chosen at runtime, and (2) processes may not all be ready at the same time. #R##N#We design and implement Hoplite, a communication layer for task-based distributed systems that achieves high performance collective communication without compromising application flexibility. The key idea of Hoplite is to use distributed protocols to compute a data transfer schedule on the fly. This enables the same optimizations used in traditional collective communication, but for applications that specify the communication incrementally. We show that Hoplite can achieve similar performance compared with a traditional collective communication library, MPICH. We port a popular distributed computing framework, Ray, on atop of Hoplite. We show that Hoplite can speed up asynchronous parameter server and distributed reinforcement learning workloads that are difficult to execute efficiently with traditional collective communication by up to 8.1x and 3.9x, respectively.

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.DC(Distributed, Parallel, and Cluster Computing)