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: "approximately universal codes over slow fading channels"
  Abstract: Performance of reliable communication over a coherent slow fading channel at high SNR is succinctly captured as a fundamental tradeoff between diversity and multiplexing gains. We study the problem of designing codes that optimally tradeoff the diversity and multiplexing gains. Our main contribution is a precise characterization of codes that are universally tradeoff-optimal, i.e., they optimally tradeoff the diversity and multiplexing gains for every statistical characterization of the fading channel. We denote this characterization as one of approximate universality where the approximation is in the connection between error probability and outage capacity with diversity and multiplexing gains, respectively. The characterization of approximate universality is then used to construct new coding schemes as well as to show optimality of several schemes proposed in the space-time coding literature.

Connected through hyperedge HE-1 (induced by source paper "space time signal design for multilevel polar coding in slow fading broadcast channels"):
  with members:
    - "throughput based design for polar coded modulation"
    - "list decoding of polar codes"
    - "aspects of polar coded modulation"
    - "precoding for outage probability minimization on block fading channels"
    - "channel polarization a method for constructing capacity achieving codes for symmetric binary input memoryless channels"
    - "space time coding techniques with bit interleaved coded modulations for mimo block fading channels"
    - "channel combining and splitting for cutoff rate improvement"

Connected through hyperedge HE-2 (induced by source paper "erasure correction of scalar codes in the presence of stragglers"):
  with members:
    - "fractional decoding error correction from partial information"
    - "improved schemes for asymptotically optimal repair of mds codes"
    - "optimal repair of reed solomon codes achieving the cut set bound"
    - "repairing reed solomon codes universally achieving the cut set bound for any number of erasures"
    - "ldpc codes over the q ary multi bit channel"
    - "repairing multiple failures for scalar mds codes"
    - "repairing reed solomon codes with multiple erasures"
    - "repairing reed solomon codes"

Connected through hyperedge HE-3 (induced by source paper "almost universal codes achieving ergodic mimo capacity within a constant gap"):
  with members:
    - "polar codes and polar lattices for independent fading channels"
    - "algebraic lattice codes achieve the capacity of the compound block fading channel"
    - "almost universal codes for fading wiretap channels"
    - "division algebra codes achieve mimo block fading channel capacity within a constant gap"
    - "number field lattices achieve gaussian and rayleigh channel capacity within a constant gap"
    - "precoded integer forcing universally achieves the mimo capacity to within a constant gap"
    - "inverse determinant sums and connections between fading channel information theory and algebra"
    - "dispersion analysis of infinite constellations in ergodic fading channels"

Connected through hyperedge HE-4 (induced by source paper "an error event sensitive tradeoff between rate and coding gain in mimo mac"):
  with members:
    - "sphere decoding complexity exponent for decoding full rate codes over the quasi static mimo channel"
    - "dmt optimality of lr aided linear decoders for a general class of channels lattice designs and system models"
    - "remarks on the criteria of constructing mimo mac dmt optimal codes"
    - "performance of mmse mimo receivers a large n analysis for correlated channels"
    - "on the decay of the determinants of multiuser mimo lattice codes"
    - "distributed space time block codes for the mimo multiple access channel"
    - "maximal orders in the design of dense space time lattice codes"
    - "diversity multiplexing tradeoff in selective fading multiple access mimo channels"

Connected through hyperedge HE-5 (induced by source paper "outage capacity of rayleigh product channels a free probability approach"):
  with members:
    - "from multi keyholes to measure of correlation and power imbalance in mimo channels outage capacity analysis"
    - "asymptotic capacity and optimal precoding in mimo multi hop relay networks"
    - "living at the edge a large deviations approach to the outage mimo capacity"
    - "asymptotic analysis of double scattering channels"
    - "finite snr diversity multiplexing tradeoff via asymptotic analysis of large mimo systems"
    - "diversity multiplexing tradeoff of double scattering mimo channels"
    - "capacity and character expansions moment generating function and other exact results for mimo correlated channels"

Connected through hyperedge HE-6 (induced by source paper "joint unitary triangularization for gaussian multi user mimo networks"):
  with members:
    - "joint unitary triangularization for mimo networks"
    - "physical layer mimo relaying"
    - "rateless coding for gaussian channels"

Connected through hyperedge HE-7 (induced by source paper "space time encoded miso broadcast channel with outdated csit an error rate and diversity performance analysis"):
  with members:
    - "the degrees of freedom region of temporally correlated mimo networks with delayed csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "degrees of freedom region of the miso broadcast channel with general mixed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "on the degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "imperfect delayed csit can be as useful as perfect delayed csit dof analysis and constructions for the bc"
    - "completely stale transmitter channel state information is still very useful"

Connected through hyperedge HE-8 (induced by source paper "shifted inverse determinant sums and new bounds for the dmt of space time lattice codes"):
  with members:
    - "a new design criterion for spherically shaped division algebra based space time codes"
    - "inverse determinant sums and connections between fading channel information theory and algebra"
    - "an error probability approach to mimo wiretap channels"
    - "on the limitations of the naive lattice decoding"

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)