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: "recognition of collapsible complexes is np complete"
  Abstract: We prove that it is NP-complete to decide whether a given (3-dimensional) simplicial complex is collapsible. This work extends a result of Malgouyres and Franc\'{e}s showing that it is NP-complete to decide whether a given simplicial complex collapses to a 1-complex.

Connected through hyperedge HE-1 (induced by source paper "collapsibility to a subcomplex of a given dimension is np complete"):
  with members:
    - "parameterized complexity of discrete morse theory"
    - "random discrete morse theory and a new library of triangulations"

Connected through hyperedge HE-2 (induced by source paper "strong collapse for persistence"):
  with members:
    - "towards persistence based reconstruction in euclidean spaces"

Connected through hyperedge HE-3 (induced by source paper "discrete morse theory for the collapsibility of supremum sections"):
  with members:
    - "dushnik miller dimension of td delaunay complexes"

Connected through hyperedge HE-4 (induced by source paper "parameterized complexity of discrete morse theory"):
  with members:
    - "completely inapproximable monotone and antimonotone parameterized problems"
    - "random discrete morse theory and a new library of triangulations"

Connected through hyperedge HE-5 (induced by source paper "efficient algorithms to decide tightness"):
  with members:
    - "parameterized complexity of discrete morse theory"

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.CG(Computational Geometry)