human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "biconnectivity st numbering and other applications of dfs using o n bits"):
  Abstract: We consider space efficient implementations of some classical applications of DFS including the problem of testing biconnectivity and $2$-edge connectivity, finding cut vertices and cut edges, computing chain decomposition and $st$-numbering of a given undirected graph $G$ on $n$ vertices and $m$ edges. Classical algorithms for them typically use DFS and some $\Omega (\lg n)$ bits\footnote{We use $\lg$ to denote logarithm to the base $2$.} of information at each vertex. Building on a recent $O(n)$-bits implementation of DFS due to Elmasry et al. (STACS 2015) we provide $O(n)$-bit implementations for all these applications of DFS. Our algorithms take $O(m \lg^c n \lg\lg n)$ time for some small constant $c$ (where $c \leq 2$). Central to our implementation is a succinct representation of the DFS tree and a space efficient partitioning of the DFS tree into connected subtrees, which maybe of independent interest for designing other space efficient graph algorithms.

Includes members:
  Member "improved space efficient linear time algorithms for some classical graph problems":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "indexing graph search trees and applications")
  Member "succinct choice dictionaries":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "space efficient vertex separators for treewidth")
  Member "improved space efficient algorithms for bfs dfs and applications":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "fast breadth first search in still less space")
  Member "canonizing graphs of bounded tree width in logspace":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "graph isomorphism in quasipolynomial time parameterized by treewidth")
  Member "the mondshein sequence":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "sfcm r a novel algorithm for the hamiltonian sequence problem")
  Member "a simple test on 2 vertex and 2 edge connectivity":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "a simple certifying algorithm for 3 edge connectivity")
  Member "space time trade offs for stack based algorithms":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "common tangents of two disjoint polygons in linear time and constant workspace")
  Member "computing a visibility polygon using few variables":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "time space trade off for finding the k visibility region of a point in a polygon")

Question: Please tell me which class the source paper 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)