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: "first class variability modeling in matlab simulink"
  Abstract: Modern cars exist in an vast number of variants. Thus, variability has to be dealt with in all phases of the development process, in particular during model-based development of software-intensive functionality using Matlab/Simulink. Currently, variability is often encoded within a functional model leading to so called 150%-models which easily become very complex and do not scale for larger product lines. To counter these problems, we propose a modular variability modeling approach for Matlab/Simulink based on the concept of delta modeling [8, 9, 24]. A functional variant is described by a delta encapsulating a set of modifications. A sequence of deltas can be applied to a core product to derive the desired variant. We present a prototypical implementation, which is integrated into Matlab/Simulink and offers graphical editing of delta models.

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 "engineering delta modeling languages"):
  with members:
    - "monticore a framework for compositional development of domain specific languages"
    - "a domain specific transformation language"
    - "delta modeling for software architectures"
    - "monticore modular development of textual domain specific languages"
    - "design guidelines for domain specific languages"
    - "montiarc architectural modeling of interactive distributed and cyber physical systems"
    - "evolving delta oriented software product line architectures"
    - "delta oriented architectural variability using monticore"

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)