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: "enhancing the syslab system model with state"
  Abstract: In this report, the SysLab system model is complemented in different ways: State-box models are provided through timed port automata, for which an operational and a corresponding denotational semantics are given. Composition is defined for components modeled in the state-box view as well as for components modeled in the black-box view. This composition is well-defined for networks of infinitely many components. To show the applicability of the model, several examples are given.

Connected through hyperedge HE-1 (induced by source paper "architecture and behavior modeling of cyber physical systems with montiarcautomaton"):
  with members:
    - "concurrent timed port automata"
    - "towards a semantics of activity diagrams with semantic variation points"
    - "systems views and models of uml"
    - "system model semantics of class diagrams"
    - "modal object diagrams"
    - "cd2alloy class diagrams analysis using alloy revisited"
    - "montiarcautomaton modeling architecture and behavior of robotic systems"
    - "montiarc architectural modeling of interactive distributed and cyber physical systems"

Connected through hyperedge HE-2 (induced by source paper "modular description of a comprehensive semantics model for the uml version 2 0"):
  with members:
    - "systems views and models of uml"
    - "system model based simulation of uml models"
    - "an algebraic view on the semantics of model composition"
    - "meta modelling semantics of uml"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"

Connected through hyperedge HE-3 (induced by source paper "systems views and models of uml"):
  with members:
    - "concurrent timed port automata"
    - "state based service description"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"
    - "towards a precise semantics for object oriented modeling techniques"

Connected through hyperedge HE-4 (induced by source paper "feature specification and refinement with state transition diagrams"):
  with members:
    - "automata describing object behavior"

Connected through hyperedge HE-5 (induced by source paper "software and system modeling based on a unified formal semantics"):
  with members:
    - "exemplary and complete object interaction descriptions"
    - "state based service description"
    - "towards a formalization of the unified modeling language"
    - "a stream based mathematical model for distributed information processing systems the syslab system model"
    - "refinement of information flow architectures"
    - "towards a precise semantics for object oriented modeling techniques"
    - "automata describing object behavior"

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.SE(Software Engineering)