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: "solvability of matrix exponential equations"
  Abstract: We consider a continuous analogue of (Babai et al. 1996)’s and (Cai et al. 2000)’s problem of solving multiplicative matrix equations. Given k + 1 square matrices A 1 ,…, A k , C, all of the same dimension, whose entries are real algebraic, we examine the problem of deciding whether there exist non-negative reals t 1 , …, t k  such that\begin{equation*} \prod\limits_{i = 1}^k {\exp ({A_i}{t_i})} = C. \end{equation*}We show that this problem is undecidable in general, but decidable under the assumption that the matrices A 1 , …, A k  commute. Our results have applications to reachability problems for linear hybrid automata.Our decidability proof relies on a number of theorems from algebraic and transcendental number theory, most notably those of Baker, Kronecker, Lindemann, and Masser, as well as some useful geometric and linear-algebraic results, including the Minkowski-Weyl theorem and a new (to the best of our knowledge) result about the uniqueness of strictly upper triangular matrix logarithms of upper unitriangular matrices. On the other hand, our undecidability result is shown by reduction from Hilbert’s Tenth Problem.

Connected through hyperedge HE-1 (induced by source paper "on the mortality problem from multiplicative matrix equations to linear recurrence sequences and beyond"):
  with members:
    - "on the identity problem for the special linear group and the heisenberg group"
    - "on the skolem problem for continuous linear dynamical systems"
    - "on termination of integer linear loops"
    - "tighter undecidability bounds for matrix mortality zero in the corner problems and more"
    - "on the positivity problem for simple linear recurrence sequences"
    - "on the complexity of the orbit problem"
    - "positivity problems for low order linear recurrence sequences"

Connected through hyperedge HE-2 (induced by source paper "decidability of the mortality problem from multiplicative matrix equations to linear recurrence sequences and beyond"):
  with members:
    - "on the identity problem for the special linear group and the heisenberg group"
    - "on termination of integer linear loops"

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.DM(Discrete Mathematics)