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: "improved bounds and new techniques for davenport schinzel sequences and their generalizations"
  Abstract: We present several new results regarding λs(n), the maximum length of a Davenport--Schinzel sequence of order s on n distinct symbols.   First, we prove that λs(n) l n ṡ 2(1/te)α(n)t + O(α(n)t−1) for s g 4 even, and λs(n) l n ṡ 2(1/te)α(n)t log2 α(n) + O(α(n)t) for sg 3 odd, where t e ⌊(s−2)/2⌋, and α(n) denotes the inverse Ackermann function. The previous upper bounds, by Agarwal et al. l1989r, had a leading coefficient of 1 instead of 1/te in the exponent. The bounds for even s are now tight up to lower-order terms in the exponent. These new bounds result from a small improvement on the technique of Agarwal et al.   More importantly, we also present a new technique for deriving upper bounds for λs(n). This new technique is very similar to the one we applied to the problem of stabbing interval chains lAlon et al. 2008r. With this new technique we: (1) re-derive the upper bound of λ3(n) l 2n α(n) + O(n sα(n)) (first shown by Klazar l1999r); (2) re-derive our own new upper bounds for general s and (3) obtain improved upper bounds for the generalized Davenport--Schinzel sequences considered by Adamec et al. l1992r.   Regarding lower bounds, we show that λ3(n) g 2n α(n) − O(n) (the previous lower bound (Sharir and Agarwal, 1995) had a coefficient of 1/2), so the coefficient 2 is tight. We also present a simpler variant of the construction of Agarwal et al. l1989r that achieves the known lower bounds of λs(n) g n ṡ 2(1/te) α(n)t − O(α(n)t−1) for s g 4 even.

Connected through hyperedge HE-1 (induced by source paper "an algorithm for bounding extremal functions of forbidden sequences"):
  with members:
    - "bounding sequence extremal functions with formations"
    - "sharp bounds on davenport schinzel sequences of every order"

Connected through hyperedge HE-2 (induced by source paper "pattern avoiding access in binary search trees"):
  with members:
    - "greedy is an almost optimal deque"
    - "self adjusting binary search trees what makes them tick"
    - "combining binary search trees"
    - "the computational landscape of permutation patterns"
    - "in pursuit of the dynamic optimality conjecture"
    - "upper bounds for maximally greedy binary search trees"
    - "splay trees davenport schinzel sequences and the deque conjecture"

Connected through hyperedge HE-3 (induced by source paper "on the zone of a circle in an arrangement of lines"):
  with members:
    - "on the zone of the boundary of a convex body"
    - "sharp bounds on davenport schinzel sequences of every order"
    - "splay trees davenport schinzel sequences and the deque conjecture"

Connected through hyperedge HE-4 (induced by source paper "on kinetic range spaces and their applications"):
  with members:
    - "interference minimization in asymmetric sensor networks"
    - "minimizing interference in ad hoc networks with bounded communication radius"
    - "tight lower bounds for the size of epsilon nets"

Connected through hyperedge HE-5 (induced by source paper "sequences of formation width 4 and alternation length 5"):
  with members:
    - "bounding sequence extremal functions with formations"

Connected through hyperedge HE-6 (induced by source paper "sharp bounds on davenport schinzel sequences of every order"):
  with members:
    - "convex hull of points lying on lines in o nlogn time after preprocessing"
    - "complexity of a single face in an arrangement of s intersecting curves"
    - "convex hull of imprecise points in o n log n time after preprocessing"
    - "largest empty circle centered on a query line"
    - "a kinetic triangulation scheme for moving points in the plane"
    - "querying two boundary points for shortest paths in a polygonal domain"
    - "splay trees davenport schinzel sequences and the deque conjecture"

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)