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: "rings an efficient java scala library for polynomial rings"
  Abstract: Abstract   In this paper we briefly discuss  Rings  — an efficient lightweight library for commutative algebra. Polynomial arithmetic, GCDs, polynomial factorization and Grobner bases are implemented with the use of modern asymptotically fast algorithms.  Rings  can be easily interacted or embedded in applications in high-energy physics and other research areas via a simple API with fully typed hierarchy of algebraic structures and algorithms for commutative algebra. The use of the Scala language brings a quite novel powerful, strongly typed functional programming model allowing to write short, expressive, and fast code for applications. At the same time Rings shows one of the best performances among existing software for algebraic calculations.    Program summary  Program Title:  Rings   Program Files doi:  http://dx.doi.org/10.17632/2k79hftjy9.1   Licensing provisions: Apache 2.0  Programming language: Java, Scala  Nature of problem: Fast methods for rational function arithmetic, simplification of polynomial expressions, Grobner bases and other related computer algebra methods naturally arising in physical applications  Solution method: Efficient implementation of modern asymptotically fast algorithms in Java language  External routines: Java 8 and higher, Scala 2.11 or 2.12  Additional comments: project page:  https://github.com/PoslavskySV/rings ,   documentation:  http://rings.readthedocs.io/en/latest/

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.SC(Symbolic Computation)