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: "an algorithm for deciding the summability of bivariate rational functions"
  Abstract: Let $\Delta_x f(x,y)=f(x+1,y)-f(x,y)$ and $\Delta_y f(x,y)=f(x,y+1)-f(x,y)$ be the difference operators with respect to $x$ and $y$. A rational function $f(x,y)$ is called summable if there exist rational functions $g(x,y)$ and $h(x,y)$ such that $f(x,y)=\Delta_x g(x,y) + \Delta_y h(x,y)$. Recently, Chen and Singer presented a method for deciding whether a rational function is summable. To implement their method in the sense of algorithms, we need to solve two problems. The first is to determine the shift equivalence of two bivariate polynomials. We solve this problem by presenting an algorithm for computing the dispersion sets of any two bivariate polynomials. The second is to solve a univariate difference equation in an algebraically closed field. By considering the irreducible factorization of the denominator of $f(x,y)$ in a general field, we present a new criterion which requires only finding a rational solution of a bivariate difference equation. This goal can be achieved by deriving a universal denominator of the rational solutions and a degree bound on the numerator. Combining these two algorithms, we can decide the summability of a bivariate rational function.

Connected through hyperedge HE-1 (induced by source paper "on the existence of telescopers for rational functions in three variables"):
  with members:
    - "constructing minimal telescopers for rational functions in three discrete variables"
    - "existence problem of telescopers for rational functions in three variables the mixed cases"
    - "bivariate extensions of abramov s algorithm for rational summation"
    - "existence problem of telescopers beyond the bivariate case"
    - "some open problems related to creative telescoping"
    - "computing periods of rational integrals"
    - "testing equivalence of polynomials under shifts"
    - "creative telescoping for rational functions using the griffiths dwork method"

Connected through hyperedge HE-2 (induced by source paper "constructing minimal telescopers for rational functions in three discrete variables"):
  with members:
    - "existence problem of telescopers beyond the bivariate case"
    - "reduction based creative telescoping for algebraic functions"
    - "reduction based creative telescoping for fuchsian d finite functions"
    - "new bounds for hypergeometric creative telescoping"
    - "multiple binomial sums"
    - "a modified abramov petkovsek reduction and creative telescoping for hypergeometric terms"
    - "hermite reduction and creative telescoping for hyperexponential functions"
    - "creative telescoping for rational functions using the griffiths dwork method"

Connected through hyperedge HE-3 (induced by source paper "existence problem of telescopers for rational functions in three variables the mixed cases"):
  with members:
    - "bivariate extensions of abramov s algorithm for rational summation"
    - "existence problem of telescopers beyond the bivariate case"
    - "parallel telescoping and parameterized picard vessiot theory"
    - "testing equivalence of polynomials under shifts"
    - "telescopers for rational and algebraic functions via residues"
    - "on the existence of telescopers for mixed hypergeometric terms"
    - "a non holonomic systems approach to special function identities"
    - "parameterized telescoping proves algebraic independence of sums"

Connected through hyperedge HE-4 (induced by source paper "bivariate extensions of abramov s algorithm for rational summation"):
  with members:
    - "existence problem of telescopers beyond the bivariate case"
    - "reduction based creative telescoping for algebraic functions"
    - "reduction based creative telescoping for fuchsian d finite functions"
    - "some open problems related to creative telescoping"
    - "hermite reduction and creative telescoping for hyperexponential functions"
    - "telescopers for rational and algebraic functions via residues"
    - "on the existence of telescopers for mixed hypergeometric terms"

Connected through hyperedge HE-5 (induced by source paper "some open problems related to creative telescoping"):
  with members:
    - "efficient algorithms for mixed creative telscoping"
    - "existence problem of telescopers beyond the bivariate case"
    - "computing hypergeometric solutions of second order linear differential equations using quotients of formal solutions and integral bases"
    - "reduction based creative telescoping for algebraic functions"
    - "new bounds for hypergeometric creative telescoping"
    - "multiple binomial sums"
    - "a modified abramov petkovsek reduction and creative telescoping for hypergeometric terms"
    - "a generalized apagodu zeilberger algorithm"

Connected through hyperedge HE-6 (induced by source paper "existence problem of telescopers beyond the bivariate case"):
  with members:
    - "testing equivalence of polynomials under shifts"
    - "on the existence of telescopers for mixed hypergeometric terms"
    - "a non holonomic systems approach to special function identities"

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)