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: "autoreq expressing and verifying requirements for control systems"
  Abstract: The considerable effort of writing requirements is only worthwhile if the result meets two conditions: the requirements reflect stakeholders' needs, and the implementation satisfies them. In usual approaches, the use of different notations for requirements (often natural language) and implementations (a programming language) makes both conditions elusive. AutoReq, presented in this article, takes a different approach to both the writing of requirements and their verification. Applying the approach to a well-documented example, a landing gear system, allowed for a mechanical proof of consistency and uncovered an error in a published discussion of the problem.

Connected through hyperedge HE-1 (induced by source paper "formality in software requirements"):
  with members:
    - "a contract based method to specify stimulus response requirements"
    - "complete contracts through specification drivers"
    - "unifying requirements and code an example"
    - "reasoning about identifier spaces how to make chord correct"
    - "autoproof auto active functional verification of object oriented programs"

Connected through hyperedge HE-2 (induced by source paper "seamless object oriented requirements"):
  with members:
    - "object oriented requirements reusable understandable verifiable"
    - "complete contracts through specification drivers"
    - "autoproof auto active functional verification of object oriented programs"
    - "flexible invariants through semantic collaboration"

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)