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: "matroid pathwidth and code trellis complexity"
  Abstract: We relate the notion of matroid pathwidth to the minimum trellis state-complexity (which we term trellis-width) of a linear code, and to the pathwidth of a graph. By reducing from the problem of computing the pathwidth of a graph, we show that the problem of determining the pathwidth of a representable matroid is NP-hard. Consequently, the problem of computing the trellis-width of a linear code is also NP-hard. For a finite field $\F$, we also consider the class of $\F$-representable matroids of pathwidth at most $w$, and correspondingly, the family of linear codes over $\F$ with trellis-width at most $w$. These are easily seen to be minor-closed. Since these matroids (and codes) have branchwidth at most $w$, a result of Geelen and Whittle shows that such matroids (and the corresponding codes) are characterized by finitely many excluded minors. We provide the complete list of excluded minors for $w=1$, and give a partial list for $w=2$.

Connected through hyperedge HE-1 (induced by source paper "comparing linear width parameters for directed graphs"):
  with members:
    - "on the pathwidth of almost semicomplete digraphs"
    - "the rank width of edge coloured graphs"
    - "subexponential parameterized algorithm for computing the cutwidth of a semi complete digraph"
    - "jungles bundles and fixed parameter tractability"

Connected through hyperedge HE-2 (induced by source paper "the art of trellis decoding is fixed parameter tractable"):
  with members:
    - "an fpt algorithm and a polynomial kernel for linear rankwidth 1 vertex deletion"
    - "constructive algorithm for path width of matroids"
    - "myhill nerode methods for hypergraphs"
    - "fast matrix rank algorithms and applications"

Connected through hyperedge HE-3 (induced by source paper "a simpler self reduction algorithm for matroid path width"):
  with members:
    - "constructive algorithm for path width of matroids"

Connected through hyperedge HE-4 (induced by source paper "an fpt algorithm and a polynomial kernel for linear rankwidth 1 vertex deletion"):
  with members:
    - "further kernelization of proper interval vertex deletion new observations and refined analysis"
    - "a single exponential fixed parameter algorithm for distance hereditary vertex deletion"
    - "constructive algorithm for path width of matroids"
    - "unit interval editing is fixed parameter tractable"
    - "a note on graphs of linear rank width 1"
    - "interval deletion is fixed parameter tractable"
    - "a polynomial kernel for proper interval vertex deletion"
    - "linear kernels and single exponential algorithms via protrusion decompositions"

Connected through hyperedge HE-5 (induced by source paper "constructive algorithm for path width of matroids"):
  with members:
    - "a simpler self reduction algorithm for matroid path width"
    - "an fpt algorithm and a polynomial kernel for linear rankwidth 1 vertex deletion"
    - "myhill nerode methods for hypergraphs"
    - "fast matrix rank algorithms and applications"

Connected through hyperedge HE-6 (induced by source paper "myhill nerode methods for hypergraphs"):
  with members:
    - "possible and necessary winner problem in social polls"
    - "approximating acyclicity parameters of sparse hypergraphs"

Connected through hyperedge HE-7 (induced by source paper "optimal locally repairable codes and connections to matroid theory"):
  with members:
    - "optimal locally repairable and secure codes for distributed storage systems"
    - "on the combinatorics of locally repairable codes via matroid theory"
    - "a family of optimal locally recoverable codes"
    - "explicit maximally recoverable codes with locality"
    - "update efficiency and local repairability limits for capacity approaching codes"
    - "xoring elephants novel erasure codes for big data"
    - "on the locality of codeword symbols in non linear codes"
    - "an upper bound on the size of locally recoverable codes"

Connected through hyperedge HE-8 (induced by source paper "on minimal tree realizations of linear codes"):
  with members:
    - "constraint complexity of realizations of linear codes on arbitrary graphs"
    - "a decomposition theory for binary linear codes"
    - "the extraction and complexity limits of graphical models for linear codes"

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)