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: "outer bounds for the capacity region of a gaussian two way relay channel"
  Abstract: We consider a three-node half-duplex Gaussian relay network where two nodes (say $a$, $b$) want to communicate with each other and the third node acts as a relay for this twoway communication. Outer bounds and achievable rate regions for the possible rate pairs $(R_a, R_b)$ for two-way communication are investigated. The modes (transmit or receive) of the halfduplex nodes together specify the state of the network. A relaying protocol uses a specific sequence of states and a coding scheme for each state. In this paper, we first obtain an outer bound for the rate region of all achievable $(R_a,R_b)$ based on the half-duplex cut-set bound. This outer bound can be numerically computed by solving a linear program. It is proved that at any point on the boundary of the outer bound only four of the six states of the network are used. We then compare it with achievable rate regions of various known protocols. We consider two kinds of protocols: (1) protocols in which all messages transmitted in a state are decoded with the received signal in the same state, and (2) protocols where information received in one state can also be stored and used as side information to decode messages in future states. Various conclusions are drawn on the importance of using all states, use of side information, and the choice of processing at the relay. Then, two analytical outer bounds (as opposed to an optimization problem formulation) are derived. Using an analytical outer bound, we obtain the symmetric capacity within 0.5 bits for some channel conditions where the direct link between nodes a and b is weak.

Connected through hyperedge HE-1 (induced by source paper "on the dof of two way 2 2 2 relay networks with or without relay caching"):
  with members:
    - "fundamental limits of cache aided interference management"
    - "on the capacity regions of two way diamond channels"
    - "beyond one way communication degrees of freedom of multi way relay mimo interference networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "caching eliminates the wireless bottleneck in video aware wireless networks"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"

Connected through hyperedge HE-2 (induced by source paper "the dof of two way butterfly networks"):
  with members:
    - "sprout a functional caching approach to minimize service latency in erasure coded storage"
    - "on the capacity regions of two way diamond channels"
    - "beyond one way communication degrees of freedom of multi way relay mimo interference networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "caching eliminates the wireless bottleneck in video aware wireless networks"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"

Connected through hyperedge HE-3 (induced by source paper "on the capacity regions of two way diamond channels"):
  with members:
    - "on the symmetric k user interference channels with limited feedback"
    - "on the capacity and degrees of freedom regions of two user mimo interference channels with limited receiver cooperation"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"
    - "the gaussian two way diamond channel"
    - "on the capacity region and the generalized degrees of freedom region for the mimo interference channel with feedback"
    - "divide and conquer approaching the capacity of the two pair bidirectional gaussian relay network"

Connected through hyperedge HE-4 (induced by source paper "decode forward transmission for the two way relay channels"):
  with members:
    - "decode forward and compute forward coding schemes for the two way relay channel"

Connected through hyperedge HE-5 (induced by source paper "nested lattice codes for gaussian two way relay channels"):
  with members:
    - "nested lattice codes for gaussian relay networks with interference"
    - "on achievable rate regions of the asymmetric awgn two way relay channel"
    - "lattice codes for the gaussian relay channel decode and forward and compress and forward"
    - "channel coding and decoding in a relay system operated with physical layer network coding"
    - "compute and forward harnessing interference through structured codes"
    - "approximate capacity of the two way relay channel a deterministic approach"
    - "joint source channel coding with side information using hybrid digital analog codes"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-6 (induced by source paper "multi way information exchange over completely connected interference networks with a multi antenna relay"):
  with members:
    - "two way interference channels"
    - "degrees of freedom of two hop wireless networks everyone gets the entire cake"
    - "divide and conquer approaching the capacity of the two pair bidirectional gaussian relay network"
    - "index coding an interference alignment perspective"
    - "not too delayed csit achieves the optimal degrees of freedom"
    - "the capacity region of multiway relay channels over finite fields with full data exchange"
    - "on the sum capacity of the y channel"
    - "multiple unicast capacity of 2 source 2 sink networks"

Connected through hyperedge HE-7 (induced by source paper "capacity region bounds and resource allocation for two way ofdm relay channels"):
  with members:
    - "optimal power allocation for two way decode and forward ofdm relay networks"
    - "a tutorial on the optimization of amplify and forward mimo relay systems"
    - "optimal real time spectrum sharing between cooperative relay and ad hoc networks"
    - "optimization framework and graph based approach for relay assisted bidirectional ofdma cellular networks"
    - "broadcast capacity region of two phase bidirectional relaying"
    - "on the capacity and diversity multiplexing tradeoff of the two way relay channel"
    - "mimo two way relay channel diversity multiplexing tradeoff analysis"

Connected through hyperedge HE-8 (induced by source paper "the gaussian two way diamond channel"):
  with members:
    - "nested lattice codes for gaussian relay networks with interference"
    - "on the capacity of the half duplex diamond channel"
    - "compute and forward harnessing interference through structured codes"
    - "physical network coding in two way wireless relay 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)