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: "refinement of pipe and filter architectures"
  Abstract: Software and hardware architectures are prone to modifications. We demonstrate how a mathematically founded powerful refinement calculus for a class of architectures, namely pipe and filter architectures, can be used to modify a system in a provably correct way. The calculus consists of basic rules to add and to remove filters (components) and pipes (channels) to a system. A networking example demonstrates some of the features of our calculus.#R##N##R##N#The calculus is simple, flexible and compositional. Thus it allows us to build more complex and specific rules that e.g. embed models of existing architectures or define design patterns as transformation rules.

Connected through hyperedge HE-1 (induced by source paper "montiarc architectural modeling of interactive distributed and cyber physical systems"):
  with members:
    - "towards a system model for uml the structural data model"
    - "efficient editor generation for compositional dsls in eclipse"
    - "towards a family based analysis of applicability conditions in architectural delta models"
    - "system model semantics of class diagrams"
    - "monticore a framework for compositional development of domain specific languages"
    - "modelling automotive function nets with views for features variants and modes"
    - "delta modeling for software architectures"
    - "monticore modular development of textual domain specific languages"

Connected through hyperedge HE-2 (induced by source paper "towards logical architecture and formal analysis of dependencies between services"):
  with members:
    - "model based hazard and impact analysis"
    - "compositional properties of crypto based components"
    - "human factors of formal methods"
    - "formalisation and analysis of component dependencies"
    - "stream processing components isabelle hol formalisation and case studies"

Connected through hyperedge HE-3 (induced by source paper "modeling variants of automotive systems using views"):
  with members:
    - "modelling automotive function nets with views for features variants and modes"
    - "view based modeling of function nets"
    - "refinement of information flow architectures"

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)