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: "descriptive complexity of graph spectra"
  Abstract: Two graphs are co-spectral if their respective adjacency matrices have the same multi-set of eigenvalues. A graph is said to be determined by its spectrum if all graphs that are co-spectral with it are isomorphic to it. We consider these properties in relation to logical definability. We show that any pair of graphs that are elementarily equivalent with respect to the three-variable counting first-order logic $$C^3$$ are co-spectral, and this is not the case with $$C^2$$, nor with any number of variables if we exclude counting quantifiers. We also show that the class of graphs that are determined by their spectra is definable in partial fixed-point logic with counting. We relate these properties to other algebraic and combinatorial problems.

Connected through hyperedge HE-1 (induced by source paper "on the expressive power of linear algebra on graphs"):
  with members:
    - "on the expressiveness of lara a unified language for linear and relational algebra"
    - "laradb a minimalist kernel for linear and relational algebra computation"
    - "on the expressive power of query languages for matrices"
    - "on the combinatorial power of the weisfeiler lehman algorithm"
    - "towards linear algebra over normalized data"
    - "foundations of modern query languages for graph databases"
    - "rank logic is dead long live rank logic"
    - "dimension reduction via colour refinement"

Connected through hyperedge HE-2 (induced by source paper "definable ellipsoid method sums of squares proofs and the isomorphism problem"):
  with members:
    - "a finite model theoretic view on propositional proof complexity"
    - "limitations of algebraic approaches to graph isomorphism testing"
    - "hardness of robust graph isomorphism lasserre gaps and asymmetry of random graphs"
    - "semidefinite programming and arithmetic circuit evaluation"

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.LO(Logic in Computer Science)