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: "service chain and virtual network embeddings approximations using randomized rounding"
  Abstract: The SDN and NFV paradigms enable novel network services which can be realized and embedded in a flexible and rapid manner. For example, SDN can be used to flexibly steer traffic from a source to a destination through a sequence of virtualized middleboxes, in order to realize so-called service chains. The service chain embedding problem consists of three tasks: admission control, finding suitable locations to allocate the virtualized middleboxes and computing corresponding routing paths. This paper considers the offline batch embedding of multiple service chains. Concretely, we consider the objectives of maximizing the profit by embedding an optimal subset of requests or minimizing the costs when all requests need to be embedded. Interestingly, while the service chain embedding problem has recently received much attention, so far, only non- polynomial time algorithms (based on integer programming) as well as heuristics (which do not provide any formal guarantees) are known. This paper presents the first polynomial time service chain approximation algorithms both for the case with admission and without admission control. Our algorithm is based on a novel extension of the classic linear programming and randomized rounding technique, which may be of independent interest. In particular, we show that our approach can also be extended to more complex service graphs, containing cycles or sub-chains, hence also providing new insights into the classic virtual network embedding problem.

Connected through hyperedge HE-1 (induced by source paper "robust network function virtualization"):
  with members:
    - "integrated nfv sdn architectures a systematic literature review"
    - "a scalable approach for service chain mapping with multiple sc instances in a wide area network"
    - "shortest path and maximum flow problems under service function chaining constraints"
    - "service function chaining resource allocation a survey"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "network function virtualization state of the art and research challenges"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "lp rounding algorithms for facility location problems"

Connected through hyperedge HE-2 (induced by source paper "joint reliability aware and cost efficient path allocation and vnf placement using sharing scheme"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"
    - "on the trade off between computational load and reliability for network function virtualization"
    - "distributed service function chaining"
    - "an approximation algorithm for path computation and function placement in sdns"

Connected through hyperedge HE-3 (induced by source paper "joint failure recovery fault prevention and energy efficient resource management for real time sfc in fog supported sdn"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"
    - "distributed service function chaining"
    - "joint energy efficient and qos aware path allocation and vnf placement for service function chaining"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "fog computing based radio access networks issues and challenges"
    - "fog computing focusing on mobile users at the edge"

Connected through hyperedge HE-4 (induced by source paper "fpt approximation algorithms for the virtual network embedding problem"):
  with members:
    - "np completeness and inapproximability of the virtual network embedding problem and its variants"
    - "virtual network embedding approximations leveraging randomized rounding"
    - "merlin a language for provisioning network resources"
    - "subgraph isomorphism in planar graphs and related problems"

Connected through hyperedge HE-5 (induced by source paper "virtual network embedding approximations leveraging randomized rounding"):
  with members:
    - "fpt approximation algorithms for the virtual network embedding problem"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "online admission control and embedding of service chains"
    - "specifying and placing chains of virtual network functions"

Connected through hyperedge HE-6 (induced by source paper "walking through waypoints"):
  with members:
    - "virtual network embedding approximations leveraging randomized rounding"
    - "approximate and incremental network function placement"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "new algorithms for maximum disjoint paths based on tree likeness"
    - "online admission control and embedding of service chains"
    - "on routing disjoint paths in bounded treewidth graphs"
    - "vertex disjoint path in upward planar graphs"
    - "the planar directed k vertex disjoint paths problem is fixed parameter tractable"

Connected through hyperedge HE-7 (induced by source paper "online placement of multi component applications in edge computing environments"):
  with members:
    - "delay optimal computation task scheduling for mobile edge computing systems"
    - "fog computing based radio access networks issues and challenges"
    - "online admission control and embedding of service chains"
    - "dynamic service migration in mobile edge clouds"

Connected through hyperedge HE-8 (induced by source paper "joint energy efficient and qos aware path allocation and vnf placement for service function chaining"):
  with members:
    - "optimal virtual network function placement in multi cloud service function chaining architecture"
    - "implementation of virtual network function chaining through segment routing in a linux based nfv infrastructure"
    - "distributed service function chaining"
    - "an approximation algorithm for path computation and function placement in sdns"

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.NI(Networking and Internet Architecture)