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: "multiset estimates and combinatorial synthesis"
  Abstract: This chapter (Partially based on: Levin MS (2012) Multiset estimates and combinatorial synthesis. Electronic preprint, p 30, 9 May 2012, http://arxiv.org/abs/1205.2046 [cs.SY]) addresses new interval multiset estimates and their usage in combinatorial synthesis methods (hierarchical morphological design, multiple choice problem, knapsack problem). The definition of interval multiset estimates, operations over the estimates (integration, comparison, aggregation, alignment), and usage in combinatorial synthesis are described including many numerical examples for various types of the estimates, for the operations over the estimates, for synthesis of three-component and four components systems, for hierarchical synthesis of three-layer hierarchical system.

Connected through hyperedge HE-1 (induced by source paper "time interval balancing in multi processor scheduling of composite modular jobs preliminary description"):
  with members:
    - "towards balanced clustering part 1 preliminaries"
    - "towards integrated glance to restructuring in combinatorial optimization"
    - "towards combinatorial clustering preliminary research survey"
    - "chains into bins processes"
    - "jits just in time scheduling for real time sensor data dissemination"

Connected through hyperedge HE-2 (induced by source paper "towards balanced clustering part 1 preliminaries"):
  with members:
    - "fixed parameter approximations for k center problems in low highway dimension graphs"
    - "on the parameterized complexity of computing balanced partitions in graphs"
    - "towards combinatorial clustering preliminary research survey"
    - "recent advances in graph partitioning"
    - "fast balanced partitioning is hard even on grids and trees"
    - "balanced allocation on graphs"
    - "a complete anytime algorithm for balanced number partitioning"

Connected through hyperedge HE-3 (induced by source paper "towards decision support technology platform for modular systems"):
  with members:
    - "towards multistage design of modular systems"
    - "note on evaluation of hierarchical modular systems"
    - "towards detection of bottlenecks in modular systems"
    - "improvement extension of modular systems as combinatorial reengineering survey"
    - "morphological methods for design of modular systems a survey"
    - "towards electronic shopping of composite product"
    - "aggregation of composite solutions strategies models examples"
    - "towards configuration of applied web based information system"

Connected through hyperedge HE-4 (induced by source paper "towards detection of bottlenecks in modular systems"):
  with members:
    - "improvement extension of modular systems as combinatorial reengineering survey"
    - "morphological methods for design of modular systems a survey"
    - "spanning directed trees with many leaves"

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.SY(Systems and Control)