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: "normal factor graphs a diagrammatic approach to linear algebra"
  Abstract: Inspired by some new advances on normal factor graphs (NFGs), we introduce NFGs as a simple and intuitive diagrammatic approach towards encoding some concepts from linear algebra. We illustrate with examples the workings of such an approach and settle a conjecture of Peterson on the Pfaffian.

Connected through hyperedge HE-1 (induced by source paper "factor graphs for quantum probabilities"):
  with members:
    - "double edge factor graphs definition properties and examples"
    - "on sparsity by nuv em gaussian message passing and kalman smoothing"
    - "holographic transformation belief propagation and loop calculus for generalized probabilistic theories"
    - "the bethe permanent of a nonnegative matrix"
    - "a factor graph representation of probabilities in quantum mechanics"
    - "partition functions of normal factor graphs"
    - "monte carlo algorithms for the partition function and information rates of two dimensional channels"
    - "normal factor graphs and holographic transformations"

Connected through hyperedge HE-2 (induced by source paper "dichotomy for holant problems with a function on domain size 3"):
  with members:
    - "approximating the partition function of the ferromagnetic potts model"
    - "complexity of counting csp with complex weights"
    - "partition functions of normal factor graphs"
    - "normal factor graphs and holographic transformations"
    - "non negative weighted csps an effective complexity dichotomy"
    - "from holant to csp and back dichotomy for holant c problems"
    - "graph homomorphisms with complex values a dichotomy theorem"
    - "the complexity of weighted boolean csp"

Connected through hyperedge HE-3 (induced by source paper "a factor graph representation of probabilities in quantum mechanics"):
  with members:
    - "partition functions of normal factor graphs"
    - "normal factor graphs and holographic transformations"

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.IT(Information Theory)