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: "subtree isomorphism revisited"
  Abstract: The Subtree Isomorphism problem asks whether a given tree is contained in another given tree. The problem is of fundamental importance and has been studied since the 1960s. For some variants, e.g., ordered trees, near-linear time algorithms are known, but for the general case truly subquadratic algorithms remain elusive. #R##N#Our first result is a reduction from the Orthogonal Vectors problem to Subtree Isomorphism, showing that a truly subquadratic algorithm for the latter refutes the Strong Exponential Time Hypothesis (SETH). #R##N#In light of this conditional lower bound, we focus on natural special cases for which no truly subquadratic algorithms are known. We classify these cases against the quadratic barrier, showing in particular that: #R##N#-- Even for binary, rooted trees, a truly subquadratic algorithm refutes SETH. #R##N#-- Even for rooted trees of depth $O(\log\log{n})$, where $n$ is the total number of vertices, a truly subquadratic algorithm refutes SETH. #R##N#-- For every constant $d$, there is a constant $\epsilon_d>0$ and a randomized, truly subquadratic algorithm for degree-$d$ rooted trees of depth at most $(1+ \epsilon_d) \log_{d}{n}$. In particular, there is an $O(\min\{ 2.85^h ,n^2 \})$ algorithm for binary trees of depth $h$. #R##N#Our reductions utilize new "tree gadgets" that are likely useful for future SETH-based lower bounds for problems on trees. Our upper bounds apply a folklore result from randomized decision tree complexity.

Connected through hyperedge HE-1 (induced by source paper "tighter connections between formula sat and shaving logs"):
  with members:
    - "subquadratic algorithms for succinct stable matching"
    - "a dichotomy for regular expression membership testing"
    - "an improved combinatorial algorithm for boolean matrix multiplication"
    - "improved bounds for 3sum k sum and linear degeneracy"
    - "fr echet distance for curves revisited"
    - "which regular expression patterns are hard to match"
    - "simulating branching programs with edit distance and friends or a polylog shaved is a lower bound made"
    - "quadratic conditional lower bounds for string problems and dynamic time warping"

Connected through hyperedge HE-2 (induced by source paper "faster approximation algorithms for computing shortest cycles on weighted graphs"):
  with members:
    - "towards tight approximation bounds for graph diameter and eccentricities"
    - "fully polynomial fpt algorithms for some classes of bounded clique width graphs"
    - "new subquadratic approximation algorithms for the girth"
    - "tight hardness for shortest cycles and paths in sparse graphs"
    - "on the power of tree depth for fully polynomial fpt algorithms"
    - "approximating cycles in directed graphs fast algorithms for girth and roundtrip spanners"
    - "polynomial fixed parameter algorithms a case study for longest path on interval graphs"
    - "approximate distance oracle with constant query time"

Connected through hyperedge HE-3 (induced by source paper "conditional lower bounds for space time tradeoffs"):
  with members:
    - "how hard is it to find honest witnesses"
    - "unifying and strengthening hardness for dynamic problems via the online matrix vector multiplication conjecture"
    - "clustered integer 3sum via additive combinatorics"
    - "if the current clique algorithms are optimal so is valiant s parser"
    - "quadratic conditional lower bounds for string problems and dynamic time warping"
    - "why walking the dog takes time frechet distance has no strongly subquadratic algorithms unless seth fails"
    - "dynamic set intersection"
    - "popular conjectures imply strong lower bounds for dynamic problems"

Connected through hyperedge HE-4 (induced by source paper "conditional lower bound for subgraph isomorphism with a tree pattern"):
  with members:
    - "finding large set covers faster via the representation method"
    - "on problems as hard as cnf sat"

Connected through hyperedge HE-5 (induced by source paper "near linear lower bounds for distributed distance computations even in sparse networks"):
  with members:
    - "distributed construction of purely additive spanners"
    - "an almost tight distributed algorithm for computing single source shortest paths"
    - "algebraic methods in the congested clique"
    - "approximation of distances and shortest paths in the broadcast congest clique"
    - "popular conjectures imply strong lower bounds for dynamic problems"
    - "edit distance cannot be computed in strongly subquadratic time unless seth is false"
    - "distributed approximation algorithms for weighted shortest paths"
    - "into the square on the complexity of quadratic time solvable problems"

Connected through hyperedge HE-6 (induced by source paper "the curse of medium dimension for geometric problems in almost every norm"):
  with members:
    - "simulating branching programs with edit distance and friends or a polylog shaved is a lower bound made"
    - "if the current clique algorithms are optimal so is valiant s parser"
    - "quadratic conditional lower bounds for string problems and dynamic time warping"
    - "probabilistic polynomials and hamming nearest neighbors"
    - "why walking the dog takes time frechet distance has no strongly subquadratic algorithms unless seth fails"
    - "popular conjectures imply strong lower bounds for dynamic problems"
    - "edit distance cannot be computed in strongly subquadratic time unless seth is false"
    - "preprocessing chains for fast dihedral rotations is hard or even impossible"

Connected through hyperedge HE-7 (induced by source paper "faster algorithms for the maximum common subtree isomorphism problem"):
  with members:
    - "on maximum common subgraph problems in series parallel graphs"
    - "an optimal decomposition algorithm for tree edit distance"
    - "an even faster and more unifying algorithm for comparing trees via unbalanced bipartite matchings"

Connected through hyperedge HE-8 (induced by source paper "simulating branching programs with edit distance and friends or a polylog shaved is a lower bound made"):
  with members:
    - "an improved combinatorial algorithm for boolean matrix multiplication"
    - "quadratic conditional lower bounds for string problems and dynamic time warping"
    - "approximation and fixed parameter subquadratic algorithms for radius and diameter"
    - "probabilistic polynomials and hamming nearest neighbors"
    - "why walking the dog takes time frechet distance has no strongly subquadratic algorithms unless seth fails"
    - "threesomes degenerates and love triangles"
    - "popular conjectures imply strong lower bounds for dynamic problems"
    - "edit distance cannot be computed in strongly subquadratic time unless seth is false"

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)