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: "a sat cas approach to finding good matrices new examples and counterexamples"
  Abstract: We enumerate all circulant good matrices with odd orders divisible by 3 up to order 70. As a consequence of this we find a previously overlooked set of good matrices of order 27 and a new set of good matrices of order 57. We also find that circulant good matrices do not exist in the orders 51, 63, and 69, thereby finding three new counterexamples to the conjecture that such matrices exist in all odd orders. Additionally, we prove a new relationship between the entries of good matrices and exploit this relationship in our enumeration algorithm. Our method applies the SAT+CAS paradigm of combining computer algebra functionality with modern SAT solvers to efficiently search large spaces which are specified by both algebraic and logical constraints.

Connected through hyperedge HE-1 (induced by source paper "applying computer algebra systems with sat solvers to the williamson conjecture"):
  with members:
    - "enumeration of complex golay pairs via programmatic sat"
    - "schur number five"
    - "solving and verifying the boolean pythagorean triples problem via cube and conquer"
    - "a sat attack on the erdos discrepancy conjecture"

Connected through hyperedge HE-2 (induced by source paper "a nonexistence certificate for projective planes of order ten with weight 15 codewords"):
  with members:
    - "sat solvers and computer algebra systems a powerful combination for mathematics"
    - "enumeration of complex golay pairs via programmatic sat"
    - "schur number five"
    - "solving and verifying the boolean pythagorean triples problem via cube and conquer"
    - "computing the ramsey number r 4 3 3 using abstraction and symmetry breaking"
    - "computer aided proof of erdos discrepancy properties"
    - "practical graph isomorphism ii"
    - "green tao numbers and sat"

Connected through hyperedge HE-3 (induced by source paper "the sat cas method for combinatorial search with applications to best matrices"):
  with members:
    - "applying computer algebra systems with sat solvers to the williamson conjecture"
    - "complex golay pairs up to length 28 a search via computer algebra and programmatic sat"
    - "enumeration of complex golay pairs via programmatic sat"
    - "schur number five"
    - "solving and verifying the boolean pythagorean triples problem via cube and conquer"
    - "green tao numbers and sat"
    - "satisfiability and computing van der waerden numbers"

Connected through hyperedge HE-4 (induced by source paper "sat solvers and computer algebra systems a powerful combination for mathematics"):
  with members:
    - "applying computer algebra systems with sat solvers to the williamson conjecture"
    - "the sat cas method for combinatorial search with applications to best matrices"
    - "complex golay pairs up to length 28 a search via computer algebra and programmatic sat"
    - "enumeration of complex golay pairs via programmatic sat"
    - "computer aided proof of erdos discrepancy properties"

Connected through hyperedge HE-5 (induced by source paper "complex golay pairs up to length 28 a search via computer algebra and programmatic sat"):
  with members:
    - "enumeration of complex golay pairs via programmatic sat"

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.LO(Logic in Computer Science)