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: "logical characterizations of heap abstractions"
  Abstract: Shape analysis concerns the problem of determining "shape invariants" for programs that perform destructive updating on dynamically allocated storage. In recent work, we have shown how shape analysis can be performed, using an abstract interpretation based on 3-valued first-order logic. In that work, concrete stores are finite 2-valued logical structures, and the sets of stores that can possibly arise during execution are represented (conservatively) using a certain family of finite 3-valued logical structures. In this paper, we show how 3-valued structures that arise in shape analysis can be characterized using formulas in first-order logic with transitive closure. #R##N#We also define a non-standard ("supervaluational") semantics for 3-valued first-order logic that is more precise than a conventional 3-valued semantics, and demonstrate that the supervaluational semantics can be effectively implemented using existing theorem provers.

Connected through hyperedge HE-1 (induced by source paper "on verifying complex properties using symbolic shape analysis"):
  with members:
    - "simulating reachability using first order logic with applications to verification of linked data structures"
    - "a logic of reachable patterns in linked data structures"

Connected through hyperedge HE-2 (induced by source paper "on role logic"):
  with members:
    - "on the theory of structural subtyping"
    - "typestate checking and regular graph constraints"

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)