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: "capacity of the gaussian two way relay channel to within 1 2 bit"
  Abstract: In this paper, a Gaussian two-way relay channel, where two source nodes exchange messages with each other through a relay, is considered. We assume that all nodes operate in full-duplex mode and there is no direct channel between the source nodes. We propose an achievable scheme composed of nested lattice codes for the uplink and structured binning for the downlink. We show that the scheme achieves within 1/2 bit from the cut-set bound for all channel parameters and becomes asymptotically optimal as the signal to noise ratios increase.

Connected through hyperedge HE-1 (induced by source paper "successive integer forcing and its sum rate optimality"):
  with members:
    - "precoded integer forcing universally achieves the mimo capacity to within a constant gap"
    - "the approximate sum capacity of the symmetric gaussian k user interference channel"
    - "on the proximity factors of lattice reduction aided decoding"
    - "integer forcing linear receivers"
    - "the approximate capacity of the many to one and one to many gaussian interference channels"
    - "lattice strategies for the dirty multiple access channel"
    - "compute and forward harnessing interference through structured codes"
    - "joint physical layer coding and network coding for bi directional relaying"

Connected through hyperedge HE-2 (induced by source paper "the degrees of freedom of the mimo y channel"):
  with members:
    - "lattice coding for the two way two relay channel"
    - "divide and conquer approaching the capacity of the two pair bidirectional gaussian relay network"
    - "on the sum capacity of the y channel"
    - "the multi way relay channel"
    - "capacity theorems for the awgn multi way relay channel"
    - "bidirectional multi pair network with a mimo relay beamforming strategies and lack of duality"
    - "broadcast capacity region of two phase bidirectional relaying"

Connected through hyperedge HE-3 (induced by source paper "lattice coding for the two way two relay channel"):
  with members:
    - "nested lattice codes for gaussian relay networks with interference"
    - "lattice codes for the gaussian relay channel decode and forward and compress and forward"
    - "lattice strategies for the dirty multiple access channel"
    - "compute and forward harnessing interference through structured codes"
    - "joint physical layer coding and network coding for bi directional relaying"

Connected through hyperedge HE-4 (induced by source paper "mapping and coding design for channel coded physical layer network coding"):
  with members:
    - "pairwise check decoding for ldpc coded two way relay block fading channels"
    - "channel coding and decoding in a relay system operated with physical layer network coding"

Connected through hyperedge HE-5 (induced by source paper "approximate ergodic capacity of a class of fading 2 user 2 hop networks"):
  with members:
    - "real interference alignment exploiting the potential of single antenna systems"
    - "the approximate sum capacity of the symmetric gaussian k user interference channel"
    - "degrees of freedom of interference channels with comp transmission and reception"
    - "the ergodic capacity of phase fading interference networks"
    - "wireless network information flow a deterministic approach"
    - "computation alignment capacity approximation without noise accumulation"
    - "two unicast wireless networks characterizing the degrees of freedom"
    - "interference alignment from degrees of freedom to constant gap capacity approximations"

Connected through hyperedge HE-6 (induced by source paper "capacity results for two classes of three way channels"):
  with members:
    - "the capacity region of multiway relay channels over finite fields with full data exchange"
    - "joint physical layer coding and network coding for bi directional relaying"

Connected through hyperedge HE-7 (induced by source paper "structured interference mitigation in two hop networks"):
  with members:
    - "nested lattice codes for gaussian relay networks with interference"
    - "list decoding for nested lattices and applications to relay channels"
    - "bounds on the capacity of the relay channel with noncausal state information at source"
    - "lattice strategies for the dirty multiple access channel"
    - "compute and forward harnessing interference through structured codes"
    - "joint physical layer coding and network coding for bi directional relaying"
    - "on the role of mmse estimation in approaching the information theoretic limits of linear gaussian channels shannon meets wiener"

Connected through hyperedge HE-8 (induced by source paper "achievable rate regions and outer bounds for a multi pair bi directional relay network"):
  with members:
    - "the multi way relay channel"
    - "the mimo wireless switch relaying can increase the multiplexing gain"
    - "capacity region of the deterministic multi pair bi directional relay network"
    - "bits through relay cascades with half duplex constraint"
    - "broadcast capacity region of two phase bidirectional relaying"
    - "to code or not to code in multi hop relay channels"
    - "on the capacity and diversity multiplexing tradeoff of the two way relay channel"
    - "bi directional half duplex protocols with multiple relays"

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)