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: "a survey of state management in big data processing systems"
  Abstract: The management and usage of state are issues of paramount importance in big data processing systems (BDPS) today. They are increasingly gaining attention due to their utility in supporting complex operations in various applications. In this paper, we survey state management in BDPS and introduce a taxonomy to classify current research in this field by key characteristics. First, we present some of the most important applications of state. Then, we discuss the handling and implementation of state. Finally, we show some potential research directions in state management. This article aims to provide insight into the varying state management techniques in the literature, motivate others to pursue research in this field, and present some open questions.

Connected through hyperedge HE-1 (induced by source paper "hardware conscious stream processing a survey"):
  with members:
    - "briskstream scaling data stream processing on shared memory multicore architectures"
    - "streambox hbm stream analytics on high bandwidth hybrid memory"
    - "parallel index based stream join on a multicore cpu"
    - "join query optimization techniques for complex event processing applications"
    - "panjoin a partition based adaptive stream join"
    - "serverless computing current trends and open problems"
    - "ingestion indexing and retrieval of high velocity multidimensional sensor data on a single node"
    - "the end of a myth distributed transactions can scale"

Connected through hyperedge HE-2 (induced by source paper "aion better late than never in event time streams"):
  with members:
    - "an overview of gradient descent optimization algorithms"
    - "lightweight asynchronous snapshots for distributed dataflows"

Connected through hyperedge HE-3 (induced by source paper "fog computing applications taxonomy and requirements"):
  with members:
    - "all one needs to know about fog computing and related edge computing paradigms a complete survey"
    - "fog computing a taxonomy survey and future directions"
    - "fog computing survey of trends architectures requirements and research directions"
    - "foglearn leveraging fog based machine learning for smart system big data analytics"
    - "understanding performance of edge content caching for mobile video streaming"
    - "sdfog a software defined computing architecture for qos aware service orchestration over edge devices"
    - "decentralized computation offloading game for mobile cloud computing"
    - "long range communications in unlicensed bands the rising stars in the iot and smart city scenarios"

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.DB(Databases)