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: "integer ring sieve irs for constructing compact qc ldpc codes with large girth"
  Abstract: This paper proposes a new method of construction of compact fully-connected Quasi-Cyclic Low Density Parity Check (QC-LDPC) code with girth g = 10 and g = 12. The originality of the proposed method is to impose constraint on the exponent matrix P to reduce the search space drastically. For a targeted expansion factor of N, the first step of the method is to sieve the integer ring Z_N to make a particular sub-group with specific properties to construct the second column of P (the first column being filled with zeros). The remaining columns of P are determined recursively as multiples of the second column thanks to an adaptation of the sequentially multiplied column (SMC) method where a controlled greedy search is applied at each step. The codes constructed with the proposed semi-algebraic method have lengths that can be significantly shorter than the best counterparts in the literature. To illustrate the great potential of the SMC method, we give the explicit construction of a rate $0.75$ irregular LDPC code of size 65,220 that allows a gain of 0.15 dB compared to the code of same rate and size 64,800 of the DVB-S2.

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.IT(Information Theory)