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: "parallel and distributed methods for nonconvex optimization part i theory"
  Abstract: In this two-part paper, we propose a general algorithmic framework for the minimization of a nonconvex smooth function subject to nonconvex smooth constraints. The algorithm solves a sequence of (separable) strongly convex problems and mantains feasibility at each iteration. Convergence to a stationary solution of the original nonconvex optimization is established. Our framework is very general and flexible; it unifies several existing Successive Convex Approximation (SCA)-based algorithms such as (proximal) gradient or Newton type methods, block coordinate (parallel) descent schemes, difference of convex functions methods, and improves on their convergence properties. More importantly, and differently from current SCA approaches, it naturally leads to distributed and parallelizable implementations for a large class of nonconvex problems. #R##N#This Part I is devoted to the description of the framework in its generality. In Part II we customize our general methods to several multi-agent optimization problems, mainly in communications and networking; the result is a new class of (distributed) algorithms that compare favorably to existing ad-hoc (centralized) schemes (when they exist).

Connected through hyperedge HE-1 (induced by source paper "optimized video streaming over cloud a stall quality trade off"):
  with members:
    - "video streaming in distributed erasure coded storage systems stall duration analysis"
    - "when queueing meets coding optimal latency data retrieving scheme in storage clouds"
    - "xoring elephants novel erasure codes for big data"
    - "on the delay storage trade off in content download from coded distributed storage systems"
    - "the mds queue analysing the latency performance of erasure codes"

Connected through hyperedge HE-2 (induced by source paper "optimization of massive full dimensional mimo for positioning and communication"):
  with members:
    - "channel estimation and performance analysis of one bit massive mimo systems"
    - "a pessimistic approximation for the fisher information measure"
    - "sectoring in multi cell massive mimo systems"
    - "layered downlink precoding for c ran systems with full dimensional mimo"
    - "positioning for the internet of things a 3gpp perspective"
    - "downlink achievable rate analysis in massive mimo systems with one bit dacs"
    - "optimal fronthaul quantization for cloud radio positioning"
    - "parallel and distributed methods for nonconvex optimization part ii applications"

Connected through hyperedge HE-3 (induced by source paper "joint optimization of cloud and edge processing for fog radio access networks"):
  with members:
    - "fronthaul compression and precoding design for c rans over ergodic fading channels"
    - "fog computing based radio access networks issues and challenges"
    - "energy efficiency of downlink transmission strategies for cloud radio access networks"
    - "cooperative caching and transmission design in cluster centric small cell networks"
    - "fog networking an overview on research opportunities"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"
    - "wireless communications in the era of big data"
    - "cache aided wireless networks tradeoffs between storage and latency"

Connected through hyperedge HE-4 (induced by source paper "joint uplink downlink optimization for backhaul limited mobile cloud computing with user scheduling"):
  with members:
    - "joint subcarrier and cpu time allocation for mobile edge computing"
    - "parallel and distributed methods for nonconvex optimization part ii applications"
    - "energy efficient resource allocation for mobile edge computation offloading"
    - "decentralized computation offloading game for mobile cloud computing"
    - "a cooperative scheduling scheme of local cloud and internet cloud for delay aware mobile cloud computing"
    - "joint optimization of radio and computational resources for multicell mobile edge computing"
    - "inter layer per mobile optimization of cloud mobile computing a message passing approach"
    - "energy efficient mobile cloud computing powered by wireless energy transfer"

Connected through hyperedge HE-5 (induced by source paper "parallel and distributed methods for nonconvex optimization part ii applications"):
  with members:
    - "parallel selective algorithms for big data optimization"
    - "decomposition by partial linearization parallel optimization of multi agent systems"
    - "weighted fair multicast multigroup beamforming under per antenna power constraints"
    - "alternating rate profile optimization in single stream mimo interference channels"
    - "coordinated multicast beamforming in multicell networks"
    - "distributed optimal beamformers for cognitive radios robust to channel uncertainties"
    - "sum rate maximization in two way af mimo relaying polynomial time solutions to a class of dc programming problems"
    - "achieving global optimality for weighted sum rate maximization in the k user gaussian interference channel with multiple antennas"

Connected through hyperedge HE-6 (induced by source paper "mobile edge computing via a uav mounted cloudlet optimization of bit allocation and path planning"):
  with members:
    - "mobile cloud computing with a uav mounted cloudlet optimal bit allocation for communication and computation"
    - "energy efficient uav communication with trajectory optimization"
    - "parallel and distributed methods for nonconvex optimization part ii applications"
    - "optimal transport theory for power efficient deployment of unmanned aerial vehicles"
    - "resource allocation for machine to machine communications with unmanned aerial vehicles"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "unmanned aerial vehicle with underlaid device to device communications performance and tradeoffs"
    - "throughput maximization for mobile relaying systems"

Connected through hyperedge HE-7 (induced by source paper "ultra reliable cloud mobile computing with service composition and superposition coding"):
  with members:
    - "realizing the tactile internet haptic communications over next generation 5g cellular networks"
    - "joint optimization of radio and computational resources for multicell mobile edge computing"
    - "inter layer per mobile optimization of cloud mobile computing a message passing approach"
    - "cloud based augmentation for mobile devices motivation taxonomies and open challenges"
    - "ultra reliable communication in 5g wireless systems"
    - "joint optimization of radio resources and code partitioning in mobile cloud computing"
    - "distortion minimization in gaussian layered broadcast coding with successive refinement"

Connected through hyperedge HE-8 (induced by source paper "phase retrieval using feasible point pursuit algorithms and cramer rao bound"):
  with members:
    - "parallel and distributed methods for nonconvex optimization part ii applications"
    - "phase retrieval via wirtinger flow theory and algorithms"
    - "phaselift exact and stable signal recovery from magnitude measurements via convex programming"
    - "phase retrieval via matrix completion"

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.MA(Multiagent Systems)