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: "a new lower bound on the maximum number of satisfied clauses in max sat and its algorithmic application"
  Abstract: For a formula F in conjunctive normal form (CNF), let sat(F) be the maximum number of clauses of F that can be satisfied by a truth assignment, and let m be the number of clauses in F. It is well-known that for every CNF formula F, sat(F) ≥ m/2 and the bound is tight when F consists of conflicting unit clauses (x) and \((\bar{x})\). Since each truth assignment satisfies exactly one clause in each pair of conflicting unit clauses, it is natural to reduce F to the unit-conflict free (UCF) form. If F is UCF, then Lieberherr and Specker (J. ACM 28(2):411-421, 1981) proved that \({\rm sat}(F)\ge {\hat{\phi}} m\), where \({\hat{\phi}} =(\sqrt{5}-1)/2\).

Connected through hyperedge HE-1 (induced by source paper "fixed parameter tractability of satisfying beyond the number of variables"):
  with members:
    - "a new bound for 3 satisfiable maxsat and its algorithmic application"
    - "kernels for below upper bound parameterizations of the hitting set and directed dominating set problems"
    - "solving max r sat above a tight lower bound"

Connected through hyperedge HE-2 (induced by source paper "parameterizations of test cover with bounded test sizes"):
  with members:
    - "non existence of polynomial kernels for the test cover problem"
    - "parameterized study of the test cover problem"
    - "max cut parameterized above the edwards erd h o s bound"
    - "betweenness parameterized above tight lower bound"
    - "solving max r sat above a tight lower bound"

Connected through hyperedge HE-3 (induced by source paper "constraint satisfaction problems parameterized above or below tight bounds a survey"):
  with members:
    - "simultaneously satisfying linear equations over mathbb f _2 maxlin2 and max r lin2 parameterized above average"
    - "hypercontractive inequality for pseudo boolean functions of bounded fourier width"
    - "a new bound for 3 satisfiable maxsat and its algorithmic application"
    - "parameterized complexity of maxsat above average"
    - "on multiway cut parameterized above lower bounds"
    - "improved parameterized algorithms for constraint satisfaction"
    - "betweenness parameterized above tight lower bound"
    - "a probabilistic approach to problems parameterized above or below tight bounds"

Connected through hyperedge HE-4 (induced by source paper "parameterized complexity of maxsat above average"):
  with members:
    - "faster parameterized algorithms using linear programming"
    - "simultaneously satisfying linear equations over mathbb f _2 maxlin2 and max r lin2 parameterized above average"
    - "a new bound for 3 satisfiable maxsat and its algorithmic application"
    - "on multiway cut parameterized above lower bounds"
    - "systems of linear equations over mathbb f _2 and problems parameterized above average"
    - "a probabilistic approach to problems parameterized above or below tight bounds"
    - "solving max r sat above a tight lower bound"
    - "note on max lin 2 above average"

Connected through hyperedge HE-5 (induced by source paper "a new bound for 3 satisfiable maxsat and its algorithmic application"):
  with members:
    - "parameterized complexity of maxsat above average"
    - "improved parameterized algorithms for constraint satisfaction"
    - "solving max r sat above a tight lower bound"
    - "note on max lin 2 above average"

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)