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: "new mechanism for repeated posted price auction with a strategic buyer without discounting"
  Abstract: The repeated posted price auction is a game with two players: the seller and the buyer. This game consists of rounds, indexed by natural numbers $i=1,2,\dots$, and in each round the seller proposes to the buyer a unit of good (think of fish or a place for advertisement) with the price $Q_i$. Let the buyer's valuation of this good be $q\in \mathbb R_{>0}$, we call $q$ the {\it type} of the buyer. In each round the buyer has two options: accept the deal (and then we set $a_i=1$) or reject it (we set $a_i=0$). In this round, the buyer's {\it surplus} is $a_i(q-Q_i)$ and the seller's {\it revenue} is $a_iQ_i$. #R##N#I propose a strategy $S$ for the seller and argue why the resulting revenue is the best that the seller can achieve among a reasonable class of strategies.

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.GT(Computer Science and Game Theory)