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: "on absorption in semigroups and n ary semigroups"
  Abstract: The notion of absorption was developed a few years ago by Barto and Kozik and#N#immediately found many applications, particularly in topics related to the#N#constraint satisfaction problem. We investigate the behavior of absorption in#N#semigroups and n-ary semigroups (that is, algebras with one n-ary associative#N#operation). In the case of semigroups, we give a simple necessary and#N#sufficient condition for a semigroup to be absorbed by its subsemigroup. We#N#then proceed to n-ary semigroups, where we conjecture an analogue of this#N#necessary and sufficient condition, and prove that the conjectured condition is#N#indeed necessary and sufficient for B to absorb A (where A is an n-ary#N#semigroup and B is its n-ary subsemigroup) in the following three cases: when A#N#is commutative, when |A-B|=1 and when A is an idempotent ternary semigroup.

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)