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: "an approximation algorithm for path computation and function placement in sdns"
  Abstract: We consider the task of computing (combined) function mapping and routing for requests in Software-Defined Networks (SDNs). Function mapping refers to the assignment of nodes in the substrate network to various processing stages that requests must undergo. Routing refers to the assignment of a path in the substrate network that begins in a source node of the request, traverses the nodes that are assigned functions for this request, and ends in a destination of the request. The algorithm either rejects a request or completely serves a request, and its goal is to maximize the sum of the benefits of the served requests. The solution must abide edge and vertex capacities. We follow the framework suggested by Even for the specification of the processing requirements and routing of requests via processing-and-routing graphs (PR-graphs). In this framework, each request has a demand, a benefit, and PR-graph. Our main result is a randomized approximation algorithm for path computation and function placement with the following guarantee. Let $m$ denote the number of links in the substrate network, $\eps$ denote a parameter such that $0< \eps <1$, and $\opt_f$ denote the maximum benefit that can be attained by a fractional solution (one in which requests may be partly served and flow may be split along multiple paths). Let $\cmin$ denote the minimum edge capacity, and let $\dmax$ denote the maximum demand. Let $\Deltamax$ denote an upper bound on the number of processing stages a request undergoes. If $\cmin/(\Deltamax\cdot\dmax)=\Omega((\log m)/\eps^2)$, then with probability at least $1-\frac{1}{m}-\textit{exp}(-\Omega(\eps^2\cdot \opt_f /(\bmax \cdot \dmax)))$, the algorithm computes a $(1-\eps)$-approximate solution.

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"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "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"
    - "service chain and virtual network embeddings approximations using randomized rounding"

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"
    - "fog computing based radio access networks issues and challenges"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "fog computing focusing on mobile users at the edge"

Connected through hyperedge HE-4 (induced by source paper "np completeness and inapproximability of the virtual network embedding problem and its variants"):
  with members:
    - "fpt approximation algorithms for the virtual network embedding problem"
    - "virtual network embedding approximations leveraging randomized rounding"
    - "specifying and placing chains of virtual network functions"
    - "competitive and deterministic embeddings of virtual networks"
    - "subgraph isomorphism in planar graphs and related problems"

Connected through hyperedge HE-5 (induced by source paper "multi commodity flow with in network processing"):
  with members:
    - "virtual network embedding approximations leveraging randomized rounding"
    - "approximate and incremental network function placement"
    - "accelerating the development of software defined network optimization applications using sol"
    - "analytical approach to parallel repetition"

Connected through hyperedge HE-6 (induced by source paper "virtual network embedding approximations leveraging randomized rounding"):
  with members:
    - "fpt approximation algorithms for the virtual network embedding problem"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "online admission control and embedding of service chains"
    - "specifying and placing chains of virtual network functions"

Connected through hyperedge HE-7 (induced by source paper "walking through waypoints"):
  with members:
    - "virtual network embedding approximations leveraging randomized rounding"
    - "approximate and incremental network function placement"
    - "new algorithms for maximum disjoint paths based on tree likeness"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "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-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"
    - "service chain and virtual network embeddings approximations using randomized rounding"

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)