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: "answer set solving exploiting treewidth and its limits"
  Abstract: Parameterized algorithms have been subject to extensive research of recent years and allow to solve hard problems by exploiting a parameter of the corresponding problem instances. There, one goal is to devise algorithms, where the runtime is exponential exclusively in this parameter. One particular well-studied structural parameter is treewidth. Typically, a parameterized algorithm utilizing treewidth takes or computes a tree decomposition, which is an arrangement of a graph into a tree, and evaluates the problem in parts by dynamic programming on the tree decomposition. In our research, we want to exploit treewidth in the context of Answer Set Programming (ASP), a declarative modeling and solving framework, which has been successfully applied in several application domains and industries for years. So far, we presented algorithms for ASP for the full ASP-Core-2 syntax, which is competitive especially when it comes to counting answer sets. Since dynamic programming on tree decomposition lands itself well to counting, we designed a framework for projected model counting, which applies to ASP, abstract argumentation and even to problems higher in the polynomial hierarchy. Given standard assumptions in computational complexity, we established a novel methodology for showing lower bounds, and we showed that most worst-case runtimes of our algorithms cannot be significantly improved.

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)