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: "translation like actions and aperiodic subshifts on groups"
  Abstract: It is well known that if $G$ admits a f.g. subgroup $H$ with a weakly#R##N#aperiodic SFT (resp.  an undecidable domino problem), then $G$#R##N#itself has a weakly aperiodic SFT (resp. an undecidable domino problem).#R##N#We prove that we can replace the property "$H$ is a subgroup of $G$"#R##N#by  "$H$ acts translation-like on $G$", provided $H$ is finitely presented.#R##N##R##N#In particular:#R##N#* If $G_1$ and $G_2$ are f.g. infinite groups, then $G_1#R##N#  \times G_2$ has a weakly aperiodic SFT (and actually a#R##N#  undecidable domino problem). In particular the Grigorchuk group#R##N#  has an undecidable domino problem.  #R##N#* Every infinite f.g. $p$-group admits a weakly#R##N#  aperiodic SFT.

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.FL(Formal Languages and Automata Theory)