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: "aperiodic tilings breaking translational symmetry"
  Abstract: Classical results on aperiodic tilings are rather complicated and not widely understood. In the present article, an alternative approach to these results is discussed in the hope of providing additional intuition, not apparent in classical works.

Connected through hyperedge HE-1 (induced by source paper "quantum one way permutation over the finite field of two elements"):
  with members:
    - "the p versus np problem"
    - "the tale of one way functions"

Connected through hyperedge HE-2 (induced by source paper "an aperiodic set of 11 wang tiles"):
  with members:
    - "fixed parameter undecidability for wang tilesets"
    - "yet another aperiodic tile set"

Connected through hyperedge HE-3 (induced by source paper "fixed point tile sets and their applications"):
  with members:
    - "fixed point and aperiodic tilings"

Connected through hyperedge HE-4 (induced by source paper "the domino problem of the hyperbolic plane is undecidable"):
  with members:
    - "the finite tiling problem is undecidable in the hyperbolic plane"
    - "about the domino problem in the hyperbolic plane from an algorithmic point of view"
    - "the domino problem of the hyperbolic plane is undecidable"
    - "the periodic domino problem is undecidable in the hyperbolic plane"
    - "about the domino problem in the hyperbolic plane a new solution"

Connected through hyperedge HE-5 (induced by source paper "the domino problem of the hyperbolic plane is undecidable"):
  with members:
    - "the finite tiling problem is undecidable in the hyperbolic plane"
    - "about the domino problem in the hyperbolic plane from an algorithmic point of view"
    - "the domino problem of the hyperbolic plane is undecidable"
    - "the periodic domino problem is undecidable in the hyperbolic plane"
    - "about the domino problem in the hyperbolic plane a new solution"

Connected through hyperedge HE-6 (induced by source paper "about the domino problem in the hyperbolic plane a new solution"):
  with members:
    - "about the domino problem in the hyperbolic plane from an algorithmic point of view"

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)