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: "a survey on hypergraph products"
  Abstract: A surprising diversity of different products of hypergraphs have been discussed in the literature. Most of the hypergraph products can be viewed as generalizations of one of the four standard graph products. The most widely studied variant, the so-called square product, does not have this property, however. Here we survey the literature on hypergraph products with an emphasis on comparing the alternative generalizations of graph products and the relationships among them. In this context the so-called 2-sections and L2-sections are considered. These constructions are closely linked to related colored graph structures that seem to be a useful tool for the prime factor decompositions w.r.t. specific hypergraph products. We summarize the current knowledge on the propagation of hypergraph invariants under the different hypergraph multiplications. While the overwhelming majority of the material concerns finite (undirected) hypergraphs, the survey also covers a summary of the few results on products of infinite and directed hypergraphs.

Connected through hyperedge HE-1 (induced by source paper "a local prime factor decomposition algorithm for strong product graphs"):
  with members:
    - "local algorithms for the prime factorization of strong product graphs"
    - "strong products of hypergraphs unique prime factorization theorems and algorithms"
    - "the relaxed square property"
    - "on the complexity of recognizing s composite and s prime graphs"

Connected through hyperedge HE-2 (induced by source paper "secure estimation and zero error secrecy capacity"):
  with members:
    - "state estimation with secrecy against eavesdroppers"
    - "a channel under simultaneous jamming and eavesdropping attack correlated random coding capacities under strong secrecy criteria"
    - "a nonstochastic information theory for communication and state estimation"
    - "strong secrecy from channel resolvability"

Connected through hyperedge HE-3 (induced by source paper "uncertain wiretap channels and secure estimation"):
  with members:
    - "a nonstochastic information theory for communication and state estimation"

Connected through hyperedge HE-4 (induced by source paper "on the cartesian skeleton and the factorization of the strong product of digraphs"):
  with members:
    - "local algorithms for the prime factorization of strong product graphs"
    - "strong products of hypergraphs unique prime factorization theorems and algorithms"
    - "fast recognition of partial star products and quasi cartesian products"
    - "partial star products a local covering approach for the recognition of approximate cartesian product graphs"

Connected through hyperedge HE-5 (induced by source paper "strong products of hypergraphs unique prime factorization theorems and algorithms"):
  with members:
    - "on the complexity of recognizing s composite and s prime graphs"

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.DM(Discrete Mathematics)