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 "explicit near ramanujan graphs of every degree"):
  Abstract: For every constant $d \geq 3$ and $\epsilon > 0$, we give a deterministic $\mathrm{poly}(n)$-time algorithm that outputs a $d$-regular graph on $\Theta(n)$ vertices that is $\epsilon$-near-Ramanujan; i.e., its eigenvalues are bounded in magnitude by $2\sqrt{d-1} + \epsilon$ (excluding the single trivial eigenvalue of~$d$).

Includes members:
  Member "the sdp value for random two eigenvalue csps":
    also connected through other hyperedges:
      (none)
  Member "the threshold for sdp refutation of random regular nae 3sat":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "the sdp value for random two eigenvalue csps")
  Member "ramanujan graphs in polynomial time":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "semantic security and the second largest eigenvalue of biregular graphs")
  Member "graph zeta function in the bethe free energy and loopy belief propagation":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "properties of bethe free energies and message passing in gaussian models")
  Member "a proof of alon s second eigenvalue conjecture and related problems":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "spectrum preserving short cycle removal on regular graphs")

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)