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: "interference alignment for the k user mimo interference channel"
  Abstract: We consider the K user Multiple Input Multiple Output (MIMO) Gaussian interference channel with M antennas at each transmitter and N antennas at each receiver. It is assumed that channel coefficients are fixed and are available at all transmitters and at all receivers. The main objective of this paper is to characterize the total Degrees Of Freedom (DOF) for this channel. Using a new interference alignment technique which has been recently introduced in [1], we show that MN over M+N K degrees of freedom can be achieved for almost all channel realizations. Also, a new upper-bound on the total DOF for this channel is derived. This upper-bound coincides with our achievable DOF for K ≥ K u  ≜ M+N over gcd(M,N) where gcd(M,N) denotes the greatest common divisor of M and N. This gives an exact characterization of DOF for MIMO Gaussian interference channel in the case of K ≥ K u .

Connected through hyperedge HE-1 (induced by source paper "achievable dof delay trade offs for the k user mimo interference channel with delayed csit"):
  with members:
    - "genie chains exploring outer bounds on the degrees of freedom of mimo interference networks"
    - "degrees of freedom of the k user miso interference channel with delayed local csit"
    - "on the degrees of freedom of the k user miso interference channel with imperfect delayed csit"
    - "retrospective interference alignment for the 3 user mimo interference channel with delayed csit"
    - "ergodic interference alignment with delayed feedback"
    - "on the degrees of freedom of k user siso interference and x channels with delayed csit"
    - "transmit optimization with improper gaussian signaling for interference channels"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"

Connected through hyperedge HE-2 (induced by source paper "genie chains exploring outer bounds on the degrees of freedom of mimo interference networks"):
  with members:
    - "feasibility of interference alignment for the mimo interference channel"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"
    - "degrees of freedom of mimo x networks spatial scale invariance one sided decomposability and linear feasibility"
    - "degrees of freedom of interference channels with comp transmission and reception"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"
    - "settling the feasibility of interference alignment for the mimo interference channel the symmetric square case"
    - "geometry of the 3 user mimo interference channel"

Connected through hyperedge HE-3 (induced by source paper "interference alignment for downlink cellular networks joint scheduling and precoding"):
  with members:
    - "spectral and energy efficiency trade offs in cellular networks"
    - "opportunistic downlink interference alignment"
    - "downlink interference alignment"
    - "degrees of freedom of the k user m times n mimo interference channel"
    - "approaching the capacity of wireless networks through distributed interference alignment"

Connected through hyperedge HE-4 (induced by source paper "replication based outer bounds and the optimality of half the cake for rank deficient mimo interference networks"):
  with members:
    - "genie chains exploring outer bounds on the degrees of freedom of mimo interference networks"
    - "are generalized cut set bounds tight for the deterministic interference channel"
    - "degrees of freedom of the rank deficient interference channel with feedback"
    - "feasibility of interference alignment for the mimo interference channel"
    - "the dof of the asymmetric mimo interference channel with square direct link channel matrices"
    - "the feasibility conditions for interference alignment in mimo networks"
    - "genie tree and degrees of freedom of the symmetric mimo interfering broadcast channel"
    - "a feasibility test for linear interference alignment in mimo channels with constant coefficients"

Connected through hyperedge HE-5 (induced by source paper "degrees of freedom of interference channels with hybrid beam forming"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"
    - "spatially sparse precoding in millimeter wave mimo systems"
    - "low complexity hybrid precoding in massive multiuser mimo systems"
    - "degrees of freedom of interference channels with comp transmission and reception"
    - "degrees of freedom region for an interference network with general message demands"
    - "degrees of freedom of the k user m times n mimo interference channel"

Connected through hyperedge HE-6 (induced by source paper "demo non classic interference alignment for downlink cellular networks"):
  with members:
    - "interference alignment for downlink cellular networks joint scheduling and precoding"
    - "spectral and energy efficiency trade offs in cellular networks"
    - "downlink interference alignment"
    - "on the achievability of interference alignment in the k user constant mimo interference channel"

Connected through hyperedge HE-7 (induced by source paper "real interference alignment exploiting the potential of single antenna systems"):
  with members:
    - "the approximate sum capacity of the symmetric gaussian k user interference channel"
    - "wireless network information flow a deterministic approach"
    - "interference alignment for secrecy"
    - "the degrees of freedom of compute and forward"
    - "interference alignment from degrees of freedom to constant gap capacity approximations"
    - "the approximate capacity of the many to one and one to many gaussian interference channels"
    - "on the degrees of freedom of the compound mimo broadcast channels with finite states"
    - "real interference alignment with real numbers"

Connected through hyperedge HE-8 (induced by source paper "hybrid channel pre inversion and interference alignment strategies"):
  with members:
    - "feasibility of interference alignment for the mimo interference channel"
    - "on the degrees of freedom of asymmetric mimo interference broadcast channels"
    - "on the degrees of freedom achievable through interference alignment in a mimo interference channel"
    - "grassmannian differential limited feedback for interference alignment"
    - "degrees of freedom of interference channels with comp transmission and reception"
    - "subspace alignment chains and the degrees of freedom of the three user mimo interference channel"
    - "cooperative algorithms for mimo interference channels"
    - "on feasibility of interference alignment in mimo interference networks"

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)