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: "degrees of freedom of the three user rank deficient mimo interference channel"
  Abstract: We provide the degrees of freedom (DoF) characterization for the three-user M#N# T#N# × M#N# R#N# multiple-input-multipleoutput (MIMO) interference channel (IC) with rank-deficient channel matrices, where each transmitter is equipped with M#N# T#N# antennas and each receiver with M#N# R#N# antennas, and the interfering channel matrices from each transmitter to the other two receivers are of ranks D#N# 1#N# and D#N# 2#N#, respectively. One important intermediate step for both the converse and achievability arguments is to convert the fully-connected rank-deficient channel into an equivalent partially-connected full-rank MIMO-IC by invertible linear transformations. As such, existing techniques developed for full-rank MIMO-IC can be incorporated to derive the DoF outer and inner bounds for the rank-deficient case. Our result shows that when the interfering links are weak in terms of the channel ranks, i.e., D#N# 1#N# + D#N# 2#N# ≤ min(M#N# T#N#, M#N# R#N#), zero forcing is sufficient to achieve the optimal DoF. On the other hand, when D#N# 1#N# + D#N# 2#N# > min(M#N# T#N# , M#N# R#N#), a combination of zero forcing and interference alignment is in general required for DoF optimality. The DoF characterization obtained in this paper unifies several existing results in the literature.

Connected through hyperedge HE-1 (induced by source paper "iterative distributed minimum total mse approach for secure communications in mimo interference channels"):
  with members:
    - "distributed energy spectral efficiency optimization for partial full interference alignment in multi user multi relay multi cell mimo systems"
    - "fifty years of mimo detection the road to large scale mimos"
    - "secure degrees of freedom of one hop wireless networks"
    - "limited feedback based interference alignment for interfering multi access channels"
    - "enhancing secrecy with multi antenna transmission in wireless ad hoc networks"
    - "filter design with secrecy constraints the mimo gaussian wiretap channel"
    - "interference alignment for secrecy"
    - "cooperative algorithms for mimo interference channels"

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)