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: "searching in dynamic catalogs on a tree"
  Abstract: In this paper we consider the following modification of the iterative search problem. We are given a tree $T$, so that a dynamic catalog $C(v)$ is associated with every tree node $v$. For any $x$ and for any node-to-root path $\pi$ in $T$, we must find the predecessor of $x$ in $\cup_{v\in \pi} C(v)$. We present a linear space dynamic data structure that supports such queries in $O(t(n)+|\pi|)$ time, where $t(n)$ is the time needed to search in one catalog and $|\pi|$ denotes the number of nodes on path $\pi$. We also consider the reporting variant of this problem, in which for any $x_1$, $x_2$ and for any path $\pi'$ all elements of $\cup_{v\in \pi'} (C(v)\cap [x_1,x_2])$ must be reported; here $\pi'$ denotes a path between an arbitrary node $v_0$ and its ancestor $v_1$. We show that such queries can be answered in $O(t(n)+|\pi'|+ k)$ time, where $k$ is the number of elements in the answer. To illustrate applications of our technique, we describe the first dynamic data structures for the stabbing-max problem, the horizontal point location problem, and the orthogonal line-segment intersection problem with optimal $O(\log n/\log \log n)$ query time and poly-logarithmic update time.

Connected through hyperedge HE-1 (induced by source paper "nearly optimal separation between partially and fully retroactive data structures"):
  with members:
    - "conditional lower bounds for space time tradeoffs"
    - "conditional hardness for sensitivity problems"
    - "popular conjectures as a barrier for dynamic planar graph algorithms"
    - "threesomes degenerates and love triangles"
    - "popular conjectures imply strong lower bounds for dynamic problems"
    - "higher lower bounds from the 3sum conjecture"
    - "fully retroactive approximate range and nearest neighbor searching"

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)