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 holant dichotomy is the fkt algorithm universal"
  Abstract: We prove a complexity dichotomy for complex-weighted Holant problems with an arbitrary set of symmetric constraint functions on Boolean variables. This dichotomy is specifically to answer the question: Is the FKT algorithm under a holographic transformation a \emph{universal} strategy to obtain polynomial-time algorithms for problems over planar graphs that are intractable in general? This dichotomy is a culmination of previous ones, including those for Spin Systems, Holant, and #CSP. A recurring theme has been that a holographic reduction to FKT is a universal strategy. Surprisingly, for planar Holant, we discover new planar tractable problems that are not expressible by a holographic reduction to FKT. #R##N#In previous work, an important tool was a dichotomy for #CSP^d, which denotes #CSP where every variable appears a multiple of d times. However its proof violates planarity. We prove a dichotomy for planar #CSP^2. We apply this planar #CSP^2 dichotomy in the proof of the planar Holant dichotomy. #R##N#As a special case of our new planar tractable problems, counting perfect matchings (#PM) over k-uniform hypergraphs is polynomial-time computable when the incidence graph is planar and k >= 5. The same problem is #P-hard when k=3 or k=4, which is also a consequence of our dichotomy. When k=2, it becomes #PM over planar graphs and is tractable again. More generally, over hypergraphs with specified hyperedge sizes and the same planarity assumption, #PM is polynomial-time computable if the greatest common divisor of all hyperedge sizes is at least 5.

Connected through hyperedge HE-1 (induced by source paper "perfect matchings rank of connection tensors and graph homomorphisms"):
  with members:
    - "holographic algorithm with matchgates is universal for planar csp over boolean domain"
    - "a complete dichotomy rises from the capture of vanishing signatures"
    - "counting homomorphisms and partition functions"
    - "complexity of counting csp with complex weights"
    - "an effective dichotomy for the counting constraint satisfaction problem"
    - "graph homomorphisms with complex values a dichotomy theorem"
    - "a complexity dichotomy for partition functions with mixed signs"

Connected through hyperedge HE-2 (induced by source paper "clifford gates in the holant framework"):
  with members:
    - "dichotomy for real holant c problems"
    - "the complexity of holant problems over boolean domain with non negative weights"
    - "basis collapse for holographic algorithms over all domain sizes"
    - "base collapse of holographic algorithms"
    - "holographic algorithms beyond matchgates"
    - "a complete dichotomy rises from the capture of vanishing signatures"

Connected through hyperedge HE-3 (induced by source paper "the complexity of holant problems over boolean domain with non negative weights"):
  with members:
    - "holographic algorithm with matchgates is universal for planar csp over boolean domain"
    - "holographic algorithms beyond matchgates"
    - "the complexity of weighted and unweighted csp"
    - "complexity of counting csp with complex weights"
    - "a decidable dichotomy theorem on directed graph homomorphisms with non negative weights"
    - "graph homomorphisms with complex values a dichotomy theorem"
    - "the complexity of weighted boolean csp"
    - "the complexity of weighted boolean csp with mixed signs"

Connected through hyperedge HE-4 (induced by source paper "holographic algorithm with matchgates is universal for planar csp over boolean domain"):
  with members:
    - "the complexity of counting edge colorings and a dichotomy for some higher domain holant problems"
    - "the complexity of planar boolean csp with complex weights"
    - "on tractable exponential sums"
    - "holographic algorithms without matchgates"
    - "the complexity of weighted boolean csp"
    - "the complexity of weighted boolean csp with mixed signs"

Connected through hyperedge HE-5 (induced by source paper "base collapse of holographic algorithms"):
  with members:
    - "a collapse theorem for holographic algorithms with matchgates on domain size at most 4"
    - "dichotomy for holant problems with a function on domain size 3"
    - "a theory for valiant s matchcircuits extended abstract"

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.CC(Computational Complexity)