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: "summation theory ii characterizations of boldsymbol r pi sigma extensions and algorithmic aspects"
  Abstract: Recently, $R\Pi\Sigma^*$-extensions have been introduced which extend Karr's $\Pi\Sigma^*$-fields substantially: one can represent expressions not only in terms of transcendental sums and products, but one can work also with products over primitive roots of unity. Since one can solve the parameterized telescoping problem in such rings, covering as special cases the summation paradigms of telescoping and creative telescoping, one obtains a rather flexible toolbox for symbolic summation. This article is the continuation of this work. Inspired by Singer's Galois theory of difference equations we will work out several alternative characterizations of $R\Pi\Sigma^*$-extensions: adjoining naively sums and products leads to an $R\Pi\Sigma^*$-extension iff the obtained difference ring is simple iff the ring can be embedded into the ring of sequences iff the ring can be given by the interlacing of $\Pi\Sigma^*$-extensions. From the viewpoint of applications this leads to a fully automatic machinery to represent indefinite nested sums and products in such $R\Pi\Sigma^*$-rings. In addition, we work out how the parameterized telescoping paradigm can be used to prove algebraic independence of indefinite nested sums. Furthermore, one obtains an alternative reduction tactic to solve the parameterized telescoping problem in basic $R\Pi\Sigma^*$-extensions exploiting the interlacing property.

Connected through hyperedge HE-1 (induced by source paper "towards a symbolic summation theory for unspecified sequences"):
  with members:
    - "representing q hypergeometric products and mixed versions in difference rings"
    - "algebraic independence of sequences generated by cyclotomic harmonic sums"
    - "a difference ring theory for symbolic summation"
    - "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-2 (induced by source paper "invariant generation for multi path loops with polynomial assignments"):
  with members:
    - "automated generation of non linear loop invariants utilizing hypergeometric sequences"
    - "polynomial invariants by linear algebra"

Connected through hyperedge HE-3 (induced by source paper "representing q hypergeometric products and mixed versions in difference rings"):
  with members:
    - "a difference ring theory for symbolic summation"
    - "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-4 (induced by source paper "denominator bounds for systems of recurrence equations using πσ extensions"):
  with members:
    - "a difference ring theory for symbolic summation"
    - "simplifying multiple sums in difference fields"
    - "fast algorithms for refined parameterized telescoping in difference fields"

Connected through hyperedge HE-5 (induced by source paper "automated generation of non linear loop invariants utilizing hypergeometric sequences"):
  with members:
    - "polynomial invariants by linear algebra"

Connected through hyperedge HE-6 (induced by source paper "algorithms to solve coupled systems of differential equations in terms of power series"):
  with members:
    - "a toolbox to solve coupled systems of differential and difference equations"
    - "inverse mellin transform of holonomic sequences"
    - "algebraic independence of cyclotomic harmonic sums"
    - "a difference ring theory for symbolic summation"
    - "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"

Connected through hyperedge HE-7 (induced by source paper "algebraic independence of cyclotomic harmonic sums"):
  with members:
    - "a difference ring theory for symbolic summation"
    - "the package harmonicsums computer algebra and analytic aspects of nested 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 symbolic summation approach to find optimal nested sum representations"
    - "parameterized telescoping proves algebraic independence of sums"
    - "a refined difference field theory for symbolic summation"

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)