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: "a difference ring theory for symbolic summation"
  Abstract: A summation framework is developed that enhances Karr's difference field approach. It covers not only indefinite nested sums and products in terms of transcendental extensions, but it can treat, e.g., nested products defined over roots of unity. The theory of the so-called $R\Pi\Sigma^*$-extensions is supplemented by algorithms that support the construction of such difference rings automatically and that assist in the task to tackle symbolic summation problems. Algorithms are presented that solve parameterized telescoping equations, and more generally parameterized first-order difference equations, in the given difference ring. As a consequence, one obtains algorithms for the summation paradigms of telescoping and Zeilberger's creative telescoping. With this difference ring theory one obtains a rigorous summation machinery that has been applied to numerous challenging problems coming, e.g., from combinatorics and particle physics.

Connected through hyperedge HE-1 (induced by source paper "a refined machinery to calculate large moments from coupled systems of linear differential equations"):
  with members:
    - "minimal representations and algebraic relations for single nested products"
    - "computing the inverse mellin transform of holonomic sequences using kovacic s algorithm"
    - "representing q hypergeometric products and mixed versions in difference rings"
    - "algorithms to solve coupled systems of differential equations in terms of power series"
    - "a toolbox to solve coupled systems of differential and difference equations"
    - "algebraic independence of sequences generated by cyclotomic harmonic sums"
    - "the package harmonicsums computer algebra and analytic aspects of nested sums"
    - "recent symbolic summation methods to solve coupled systems of differential and difference equations"

Connected through hyperedge HE-2 (induced by source paper "minimal representations and algebraic relations for single nested products"):
  with members:
    - "on the structure of compatible rational functions"
    - "creative telescoping for holonomic functions"
    - "fast algorithms for refined parameterized telescoping in difference fields"
    - "fast computation of smith forms of sparse matrices over local rings"
    - "order degree curves for hypergeometric creative telescoping"
    - "a symbolic summation approach to find optimal nested sum representations"
    - "parameterized telescoping proves algebraic independence of sums"
    - "a refined difference field theory for symbolic summation"

Connected through hyperedge HE-3 (induced by source paper "towards a symbolic summation theory for unspecified sequences"):
  with members:
    - "representing q hypergeometric products and mixed versions in difference rings"
    - "summation theory ii characterizations of boldsymbol r pi sigma extensions and algorithmic aspects"
    - "algebraic independence of sequences generated by cyclotomic harmonic sums"
    - "a streamlined difference ring theory indefinite nested sums the alternating sign and the parameterized telescoping problem"
    - "fast algorithms for refined parameterized telescoping in difference fields"
    - "a refined difference field theory for symbolic summation"

Connected through hyperedge HE-4 (induced by source paper "computer algebra tools for feynman integrals and related multi sums"):
  with members:
    - "representing q hypergeometric products and mixed versions in difference rings"
    - "a toolbox to solve coupled systems of differential and difference equations"
    - "algebraic independence of sequences generated by cyclotomic harmonic sums"
    - "modern summation methods for loop integrals in quantum field theory the packages sigma evaluatemultisums and sumproduction"
    - "complexity estimates for two uncoupling algorithms"
    - "ore polynomials in sage"
    - "a symbolic summation approach to feynman integral calculus"

Connected through hyperedge HE-5 (induced by source paper "refined holonomic summation algorithms in particle physics"):
  with members:
    - "representing q hypergeometric products and mixed versions in difference rings"
    - "modern summation methods for loop integrals in quantum field theory the packages sigma evaluatemultisums and sumproduction"
    - "complexity estimates for two uncoupling algorithms"
    - "fast algorithms for refined parameterized telescoping in difference fields"
    - "a symbolic summation approach to feynman integral calculus"
    - "advanced computer algebra algorithms for the expansion of feynman integrals"
    - "a fast approach to creative telescoping"
    - "a refined difference field theory for symbolic summation"

Connected through hyperedge HE-6 (induced by source paper "representing q hypergeometric products and mixed versions in difference rings"):
  with members:
    - "summation theory ii characterizations of boldsymbol r pi sigma extensions and algorithmic aspects"
    - "a streamlined difference ring theory indefinite nested sums the alternating sign and the parameterized telescoping problem"
    - "on the structure of compatible rational functions"
    - "fast algorithms for refined parameterized telescoping in difference fields"
    - "parameterized telescoping proves algebraic independence of sums"
    - "a refined difference field theory for symbolic summation"

Connected through hyperedge HE-7 (induced by source paper "denominator bounds for systems of recurrence equations using πσ extensions"):
  with members:
    - "summation theory ii characterizations of boldsymbol r pi sigma extensions and algorithmic aspects"
    - "simplifying multiple sums in difference fields"
    - "fast algorithms for refined parameterized telescoping in difference fields"

Connected through hyperedge HE-8 (induced by source paper "algorithms to solve coupled systems of differential equations in terms of power series"):
  with members:
    - "summation theory ii characterizations of boldsymbol r pi sigma extensions and algorithmic aspects"
    - "a toolbox to solve coupled systems of differential and difference equations"
    - "inverse mellin transform of holonomic sequences"
    - "algebraic independence of cyclotomic harmonic sums"
    - "a streamlined difference ring theory indefinite nested sums the alternating sign and the parameterized telescoping problem"
    - "recent symbolic summation methods to solve coupled systems of differential and difference equations"
    - "modern summation methods for loop integrals in quantum field theory the packages sigma evaluatemultisums and sumproduction"
    - "complexity estimates for two uncoupling algorithms"

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)