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 note on the unsolvability of the weighted region shortest path problem"
  Abstract: Let S be a subdivision of the plane into polygonal regions, where each region has an associated positive weight. The weighted region shortest path problem is to determine a shortest path in S between two points s, t in R^2, where the distances are measured according to the weighted Euclidean metric-the length of a path is defined to be the weighted sum of (Euclidean) lengths of the sub-paths within each region. We show that this problem cannot be solved in the Algebraic Computation Model over the Rational Numbers (ACMQ). In the ACMQ, one can compute exactly any number that can be obtained from the rationals Q by applying a finite number of operations from +, -, \times, \div, \sqrt[k]{}, for any integer k >= 2. Our proof uses Galois theory and is based on Bajaj's technique.

Connected through hyperedge HE-1 (induced by source paper "geometric secluded paths and planar satisfiability"):
  with members:
    - "on the computational complexity of length and neighborhood constrained path problems"
    - "an efficient algorithm for computing high quality paths amid polygonal obstacles"
    - "on the complexity of minimum link path problems"
    - "quickest visibility queries in polygonal domains"
    - "planar 3 sat with a clause variable cycle"
    - "a polynomial time algorithm for finding an approximate shortest path amid weighted regions"
    - "parameterized complexity of secluded connectivity problems"
    - "minimum link paths revisited"

Connected through hyperedge HE-2 (induced by source paper "efficient motion planning for problems lacking optimal substructure"):
  with members:
    - "new perspective on sampling based motion planning via random geometric graphs"
    - "risk constrained reinforcement learning with percentile risk criteria"
    - "probabilistic planning for continuous dynamic systems under bounded risk"
    - "sampling based algorithms for optimal motion planning"

Connected through hyperedge HE-3 (induced by source paper "the galois complexity of graph drawing why numerical solutions are ubiquitous for force directed spectral and circle packing drawings"):
  with members:
    - "strict confluent drawing"
    - "planar lombardi drawings for subcubic graphs"
    - "the graphs of planar soap bubbles"
    - "optimal moebius transformations for information visualization and meshing"

Connected through hyperedge HE-4 (induced by source paper "similarity of polygonal curves in the presence of outliers"):
  with members:
    - "computing the fr e chet distance with shortcuts is np hard"
    - "applied similarity problems using frechet distance"

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.CG(Computational Geometry)