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: "on the covariance matrix distortion constraint for the gaussian wyner ziv problem"
  Abstract: We first present an explicit formula R(D) for the rate-distortion function (RDF) of the vector Gaussian re- mote Wyner-Ziv problem with covariance matrix distortion constraints. To prove the lower bound, we use a particular variant of joint matrix diagonalization to establish a notion of the minimum of two symmetric positive-definite matrices. We then show that from the resulting RDF, it is possible to derive RDFs with different distortion constraints. Specifically, we rederive the RDF for the vector Gaussian remote Wyner-Ziv problem with the mean-squared error distortion constraint, and a rate-mutual information function. This is done by minimizing R(D) subject to appropriate constraints on the distortion matrix D. The key idea to solve the resulting minimization problems is to lower- bound them with simpler optimization problems and show that they lead to identical solutions. We thus illustrate the generality of the covariance matrix distortion constraint in the Wyner-Ziv setup.

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)