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: "completing partial schedules for open shop with unit processing times and routing"
  Abstract: Open Shop is a classical scheduling problem: given a set $J$ of jobs and a set $M$ of machines, find a minimum-makespan schedule to process each job $J_i\in J$ on each machine $M_q\in M$ for a given amount $p_{iq}$ of time such that each machine processes only one job at a time and each job is processed by only one machine at a time. In Routing Open Shop, the jobs are located in the vertices of an edge-weighted graph $G=(V,E)$ whose edge weights determine the time needed for the machines to travel between jobs. The travel times also have a natural interpretation as sequence-dependent family setup times. Routing Open Shop is NP-hard for $|V|=|M|=2$. For the special case with unit processing times $p_{iq}=1$, we exploit Galvin's theorem about list-coloring edges of bipartite graphs to prove a theorem that gives a sufficient condition for the completability of partial schedules. Exploiting this schedule completion theorem and integer linear programming, we show that Routing Open Shop with unit processing times is solvable in $2^{O(|V||M|^2\log|V||M|)}\cdot\mathrm{poly}(|J|)$ time, that is, fixed-parameter tractable parameterized by $|V|+|M|$. Various upper bounds shown using the schedule completion theorem suggest it to be likewise beneficial for the development of approximation algorithms.

Connected through hyperedge HE-1 (induced by source paper "scheduling meets n fold integer programming"):
  with members:
    - "a parameterized complexity view on non preemptively scheduling interval constrained jobs few machines small looseness and small slack"
    - "voting and bribing in single exponential time"
    - "interval scheduling and colorful independent sets"

Connected through hyperedge HE-2 (induced by source paper "new algorithms for minimizing the weighted number of tardy jobs on a single machine"):
  with members:
    - "scheduling meets n fold integer programming"
    - "a parameterized complexity view on non preemptively scheduling interval constrained jobs few machines small looseness and small slack"
    - "enumerative lattice algorithms in any norm via m ellipsoid coverings"

Connected through hyperedge HE-3 (induced by source paper "a fixed parameter algorithm for a routing open shop problem unit processing times few machines and locations"):
  with members:
    - "a parameterized complexity view on non preemptively scheduling interval constrained jobs few machines small looseness and small slack"
    - "interval scheduling and colorful independent sets"
    - "approximation algorithms for mixed windy and capacitated arc routing problems"
    - "parameterized complexity of the k arc chinese postman problem"
    - "structural parameterizations of the mixed chinese postman problem"
    - "parameterized complexity of k chinese postman problem"
    - "parameterized rural postman problem"

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.DM(Discrete Mathematics)