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 improved combinatorial polynomial algorithm for the linear arrow debreu market"
  Abstract: We present an improved combinatorial algorithm for the computation of equilibrium prices in the linear Arrow-Debreu model. For a market with $n$ agents and integral utilities bounded by $U$, the algorithm runs in $O(n^7 \log^3 (nU))$ time. This improves upon the previously best algorithm of Ye by a factor of $\tOmega(n)$. The algorithm refines the algorithm described by Duan and Mehlhorn and improves it by a factor of $\tOmega(n^3)$. The improvement comes from a better understanding of the iterative price adjustment process, the improved balanced flow computation for nondegenerate instances, and a novel perturbation technique for achieving nondegeneracy.

Connected through hyperedge HE-1 (induced by source paper "proportional dynamics in exchange economies"):
  with members:
    - "an alternating algorithm for finding linear arrow debreu market equilibrium"
    - "universal growth in production economies"
    - "a strongly polynomial algorithm for linear exchange markets"
    - "tracing equilibrium in dynamic markets via distributed adaptation"
    - "dynamics of distributed updating in fisher markets"
    - "selling complementary goods dynamics efficiency and revenue"
    - "best response dynamics in combinatorial auctions with item bidding"
    - "the price of anarchy in auctions"

Connected through hyperedge HE-2 (induced by source paper "satiation in fisher markets and approximation of nash social welfare"):
  with members:
    - "near optimal online algorithms and fast approximation algorithms for resource allocation problems"
    - "a strongly polynomial algorithm for linear exchange markets"
    - "approximating the nash social welfare with budget additive valuations"
    - "finding fair and efficient allocations"
    - "convex program duality fisher markets and nash social welfare"
    - "nash social welfare for indivisible items under separable piecewise linear concave utilities"
    - "nash social welfare matrix permanent and stable polynomials"
    - "apx hardness of maximizing nash social welfare with indivisible items"

Connected through hyperedge HE-3 (induced by source paper "a polynomial time algorithm for fair resource allocation in resource exchange"):
  with members:
    - "exchange of services in networks competition cooperation and fairness"

Connected through hyperedge HE-4 (induced by source paper "a strongly polynomial algorithm for linear exchange markets"):
  with members:
    - "a simpler and faster strongly polynomial algorithm for generalized flow maximization"
    - "improved balanced flow computation using parametric flow"
    - "a strongly polynomial algorithm for generalized flow maximization"
    - "a rational convex program for linear arrow debreu markets"
    - "a combinatorial polynomial algorithm for the linear arrow debreu market"
    - "concave generalized flows with applications to market equilibria"

Connected through hyperedge HE-5 (induced by source paper "approximating the nash social welfare with budget additive valuations"):
  with members:
    - "computing equilibria in markets with budget additive utilities"
    - "apx hardness of maximizing nash social welfare with indivisible items"
    - "an improved approximation guarantee for the maximum budgeted allocation problem"
    - "combinatorial walrasian equilibrium"
    - "a combinatorial polynomial algorithm for the linear arrow debreu market"
    - "on allocating goods to maximize fairness"

Connected through hyperedge HE-6 (induced by source paper "improved balanced flow computation using parametric flow"):
  with members:
    - "a rational convex program for linear arrow debreu markets"
    - "a combinatorial polynomial algorithm for the linear arrow debreu market"

Connected through hyperedge HE-7 (induced by source paper "computing equilibria in markets with budget additive utilities"):
  with members:
    - "competitive algorithms from competitive equilibria non clairvoyant scheduling under polyhedral constraints"

Connected through hyperedge HE-8 (induced by source paper "ascending price algorithms for unknown markets"):
  with members:
    - "approximating the nash social welfare with budget additive valuations"
    - "convex program duality fisher markets and nash social welfare"
    - "nash social welfare for indivisible items under separable piecewise linear concave utilities"
    - "convergence of tâtonnement in fisher markets"
    - "competitive algorithms from competitive equilibria non clairvoyant scheduling under polyhedral constraints"
    - "a rational convex program for linear arrow debreu markets"
    - "tatonnement in ongoing markets of complementary goods"
    - "the complexity of non monotone markets"

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)