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: "guarantees for the success frequency of an algorithm for finding dodgson election winners"
  Abstract: In the year 1876 the mathematician Charles Dodgson, who wrote fiction under the now more famous name of Lewis Carroll, devised a beautiful voting system that has long fascinated political scientists. However, determining the winner of a Dodgson election is known to be complete for the \Theta_2^p level of the polynomial hierarchy. This implies that unless P=NP no polynomial-time solution to this problem exists, and unless the polynomial hierarchy collapses to NP the problem is not even in NP. Nonetheless, we prove that when the number of voters is much greater than the number of candidates--although the number of voters may still be polynomial in the number of candidates--a simple greedy algorithm very frequently finds the Dodgson winners in such a way that it ``knows'' that it has found them, and furthermore the algorithm never incorrectly declares a nonwinner to be a winner.

Connected through hyperedge HE-1 (induced by source paper "achieving fully proportional representation approximability results"):
  with members:
    - "group activity selection problem"
    - "approximating the maxcover problem with bounded frequencies in fpt time"
    - "on the computation of fully proportional representation"
    - "the complexity of fully proportional representation for single crossing electorates"
    - "multimode control attacks on elections"
    - "where are the hard manipulation problems"
    - "exact complexity of the winner problem for young elections"
    - "exact analysis of dodgson elections lewis carroll s 1876 voting system is complete for parallel access to np"

Connected through hyperedge HE-2 (induced by source paper "the complexity of online voter control in sequential elections"):
  with members:
    - "control in the presence of manipulators cooperative and competitive cases"
    - "the complexity of controlling candidate sequential elections"
    - "online voter control in sequential elections"
    - "an atypical survey of typical case heuristic algorithms"
    - "the complexity of online manipulation of sequential elections"
    - "the complexity of manipulative attacks in nearly single peaked electorates"
    - "equilibria of plurality voting with abstentions"
    - "sincere strategy preference based approval voting fully resists constructive control and broadly resists destructive control"

Connected through hyperedge HE-3 (induced by source paper "multimode control attacks on elections"):
  with members:
    - "bucklin voting is broadly resistant to control"
    - "normalized range voting broadly resists control"
    - "control complexity in fallback voting"
    - "multivariate complexity analysis of swap bribery"
    - "the shield that never was societies with single peaked preferences are more open to manipulation and control"
    - "where are the really hard manipulation problems the phase transition in manipulating the veto rule"
    - "towards a dichotomy of finding possible winners in elections based on scoring rules"
    - "sincere strategy preference based approval voting fully resists constructive control and broadly resists destructive control"

Connected through hyperedge HE-4 (induced by source paper "llull and copeland voting computationally resist bribery and control"):
  with members:
    - "sincere strategy preference based approval voting fully resists constructive control and broadly resists destructive control"
    - "on approximating optimal weighted lobbying and frequency of correctness versus average case polynomial time"
    - "copeland voting fully resists constructive control"
    - "how hard is bribery in elections"
    - "hybrid elections broaden complexity theoretic resistance to control"
    - "a richer understanding of the complexity of election systems"
    - "dichotomy for voting systems"
    - "anyone but him the complexity of precluding an alternative"

Connected through hyperedge HE-5 (induced by source paper "sincere strategy preference based approval voting fully resists constructive control and broadly resists destructive control"):
  with members:
    - "llull and copeland voting computationally resist bribery and control"
    - "on approximating optimal weighted lobbying and frequency of correctness versus average case polynomial time"
    - "the strategy proofness landscape of merging"
    - "copeland voting fully resists constructive control"
    - "hybrid elections broaden complexity theoretic resistance to control"
    - "a richer understanding of the complexity of election systems"
    - "anyone but him the complexity of precluding an alternative"

Connected through hyperedge HE-6 (induced by source paper "frequency of correctness versus average case polynomial time and generalized juntas"):
  with members:
    - "on approximating optimal weighted lobbying and frequency of correctness versus average case polynomial time"
    - "average case complexity"
    - "a richer understanding of the complexity of election systems"
    - "exact complexity of the winner problem for young elections"
    - "exact analysis of dodgson elections lewis carroll s 1876 voting system is complete for parallel access to np"

Connected through hyperedge HE-7 (induced by source paper "a o log m deterministic polynomial time computable approximation of lewis carroll s scoring rule"):
  with members:
    - "exact complexity of the winner problem for young elections"
    - "exact analysis of dodgson elections lewis carroll s 1876 voting system is complete for parallel access to np"

Connected through hyperedge HE-8 (induced by source paper "copeland voting fully resists constructive control"):
  with members:
    - "llull and copeland voting computationally resist bribery and control"
    - "frequency of correctness versus average case polynomial time and generalized juntas"
    - "hybrid elections broaden complexity theoretic resistance to control"
    - "anyone but him the complexity of precluding an alternative"

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.DS(Data Structures and Algorithms)