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 degrees of freedom of mimo multiple access channel with multiple eavesdroppers"
  Abstract: Two-transmitter Gaussian multiple access wiretap channel with multiple antennas at the transmitters, legitimate receiver and eavesdroppers is studied. The existence of unknown number of eavesdroppers is assumed but with maximum number of antennas at any eavesdropper limited to a known value $N_E$. The channel matrices between the transmitters and the receiver is available everywhere, while the legitimate the legitimate transmitters and the legitimate receiver have no information about the eavesdroppers channels. A new upperbound is established and A new achievable DoF bound is provided and meets the upperbound. It is important to note that the same problem has been studied recently with arbitrarily varying eavesdropper channels and an upperbound has been derived. However, our achievable sum secure DoF exceeds their previously derived upperbound. Consequently, we revisited the uppperbound derivation and we re-derived a new mathematically robust upperbound.

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)