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: "l recursion and a new logic for logarithmic space"
  Abstract: We extend first-order logic with counting by a new operator that allows it to#N#formalise a limited form of recursion which can be evaluated in logarithmic#N#space. The resulting logic LREC has a data complexity in LOGSPACE, and it#N#defines LOGSPACE-complete problems like deterministic reachability and Boolean#N#formula evaluation. We prove that LREC is strictly more expressive than#N#deterministic transitive closure logic with counting and incomparable in#N#expressive power with symmetric transitive closure logic STC and transitive#N#closure logic (with or without counting). LREC is strictly contained in#N#fixed-point logic with counting FPC. We also study an extension LREC= of LREC#N#that has nicer closure properties and is more expressive than both LREC and#N#STC, but is still contained in FPC and has a data complexity in LOGSPACE. Our#N#main results are that LREC captures LOGSPACE on the class of directed trees and#N#that LREC= captures LOGSPACE on the class of interval graphs.

Connected through hyperedge HE-1 (induced by source paper "the complexity of bisimulation and simulation on finite systems"):
  with members:
    - "canonizing graphs of bounded tree width in logspace"
    - "testing graph isomorphism in parallel by playing a game"

Connected through hyperedge HE-2 (induced by source paper "capturing logarithmic space and polynomial time on chordal claw free graphs"):
  with members:
    - "fixed point definability and polynomial time on chordal graphs and line graphs"
    - "capturing polynomial time on interval graphs"

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)