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: "elementary properties of positive concave mappings with applications to network planning and optimization"
  Abstract: This paper presents novel methods for computing fixed points of positive concave mappings and for characterizing the existence of fixed points. These methods are particularly important in planning and optimization tasks in wireless networks. For example, previous studies have shown that the feasibility of a network design can be quickly evaluated by computing the fixed point of a concave mapping that is constructed based on many environmental and network control parameters such as the position of base stations, channel conditions, and antenna tilts. To address this and more general problems, given a positive concave mapping, we show two alternative but equivalent ways to construct a matrix that is guaranteed to have spectral radius strictly smaller than one if the mapping has a fixed point. This matrix is then used to build a new mapping that preserves the fixed point of the original positive concave mapping. We show that the standard fixed point iterations using the new mapping converges faster than the standard iterations applied to the original concave mapping. As exemplary applications of the proposed methods, we consider the problems of power and load estimation in networks based on the orthogonal frequency division multiple access (OFDMA) technology.

Connected through hyperedge HE-1 (induced by source paper "a note on decoding order in optimizing multi cell noma"):
  with members:
    - "a robust machine learning method for cell load approximation in wireless networks"
    - "a framework for optimizing multi cell noma delivering demand with less resource"
    - "resource optimization with load coupling in multi cell noma"
    - "on optimal power allocation for downlink non orthogonal multiple access systems"
    - "energy aware wireless relay selection in load coupled ofdma cellular networks"
    - "load optimization with user association in cooperative and load coupled lte networks"
    - "dynamic user clustering and power allocation for uplink and downlink non orthogonal multiple access noma systems"
    - "power and channel allocation for non orthogonal multiple access in 5g systems tractability and computation"

Connected through hyperedge HE-2 (induced by source paper "power and beam optimization for uplink millimeter wave hotspot communication systems"):
  with members:
    - "the role of asymptotic functions in network optimization and feasibility studies"
    - "adaptive beam frequency allocation algorithm with position uncertainty for millimeter wave mimo systems"
    - "overview of millimeter wave communications for fifth generation 5g wireless networks with a focus on propagation models"
    - "fundamental properties of solutions to utility maximization problems in wireless networks"
    - "millimeter wave cellular networks a mac layer perspective"
    - "a survey of millimeter wave mmwave communications for 5g opportunities and challenges"

Connected through hyperedge HE-3 (induced by source paper "resource optimization with load coupling in multi cell noma"):
  with members:
    - "a robust machine learning method for cell load approximation in wireless networks"
    - "a framework for optimizing multi cell noma delivering demand with less resource"
    - "on optimal power allocation for downlink non orthogonal multiple access systems"
    - "energy aware wireless relay selection in load coupled ofdma cellular networks"
    - "sub channel assignment power allocation and user scheduling for non orthogonal multiple access networks"
    - "load optimization with user association in cooperative and load coupled lte networks"
    - "power and channel allocation for non orthogonal multiple access in 5g systems tractability and computation"
    - "energy efficiency of distributed signal processing in wireless networks a cross layer analysis"

Connected through hyperedge HE-4 (induced by source paper "resource optimization in multi cell noma"):
  with members:
    - "a framework for optimizing multi cell noma delivering demand with less resource"
    - "on optimal power allocation for downlink non orthogonal multiple access systems"
    - "energy aware wireless relay selection in load coupled ofdma cellular networks"
    - "load optimization with user association in cooperative and load coupled lte networks"
    - "energy efficiency of distributed signal processing in wireless networks a cross layer analysis"
    - "non orthogonal multiple access in multi cell networks theory performance and practical challenges"
    - "power and load coupling in cellular networks for energy optimization"
    - "optimal cell clustering and activation for energy saving in load coupled wireless networks"

Connected through hyperedge HE-5 (induced by source paper "the role of asymptotic functions in network optimization and feasibility studies"):
  with members:
    - "performance limits of solutions to network utility maximization problems"
    - "power and load coupling in cellular networks for energy optimization"
    - "joint downlink base station association and power control for max min fairness computation and complexity"
    - "data offloading in load coupled networks a utility maximization framework"
    - "toward energy efficient 5g wireless communications technologies"
    - "analysis of cell load coupling for lte network planning and optimization"
    - "base station selection for energy efficient network operation with the majorization minimization algorithm"

Connected through hyperedge HE-6 (induced by source paper "a robust machine learning method for cell load approximation in wireless networks"):
  with members:
    - "the role of asymptotic functions in network optimization and feasibility studies"
    - "online isotonic regression"
    - "analysis of cell load coupling for lte network planning and optimization"

Connected through hyperedge HE-7 (induced by source paper "spatial mappings for planning and optimization of cellular networks"):
  with members:
    - "range assignment for power optimization in load coupled heterogeneous networks"
    - "power and load coupling in cellular networks for energy optimization"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "power estimation in lte systems with the general framework of standard interference mappings"
    - "analysis of cell load coupling for lte network planning and optimization"

Connected through hyperedge HE-8 (induced by source paper "fundamental properties of solutions to utility maximization problems in wireless networks"):
  with members:
    - "power estimation in lte systems with the general framework of standard interference mappings"
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"

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)