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: "isomorphism problem for s d graphs"
  Abstract: An $H$-graph is the intersection graph of connected subgraphs of a suitable subdivision of a fixed graph $H$. We focus on $S_d$-graphs as a special case. A graph $G$ is an $S_d$-graph when it is the intersection graph of connected subgraphs of a subdivision of a fixed star $S_d$. It is useful to mention that, for an $S_d$-graph $G$ with some proper maximal clique $C \in G$, each connected component of $G-C$ is an interval graph and the partial order on the connected components of $G-C$ has a chain cover of size $\leq d$. Considering the recognition algorithm given by Chaplick et al., we give an FPT-time algorithm to solve the isomorphism problem for $S_d$-graphs with bounded clique size. Then, we give a polynomial time reduction to $S_d$-graph isomorphism from the isomorphism problem for posets of width $d$. Finally, we show that the graph isomorphism problem for $S_d$-graphs can be solved in FPT-time with parameter $d$, even when the clique size is unbounded.

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.DS(Data Structures and Algorithms)