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: "solving linux upgradeability problems using boolean optimization"
  Abstract: Managing the software complexity of package-based systems can be regarded as one of the main challenges in software architectures. Upgrades are required on a short time basis and systems are expected to be reliable and consistent after that. For each package in the system, a set of dependencies and a set of conflicts have to be taken into account. Although this problem is computationally hard to solve, efficient tools are required. In the best scenario, the solutions provided should also be optimal in order to better fulfill users requirements and expectations. This paper describes two different tools, both based on Boolean satisfiability (SAT), for solving Linux upgradeability problems. The problem instances used in the evaluation of these tools were mainly obtained from real environments, and are subject to two different lexicographic optimization criteria. The developed tools can provide optimal solutions for many of the instances, but a few challenges remain. Moreover, it is our understanding that this problem has many similarities with other configuration problems, and therefore the same techniques can be used in other domains.

Connected through hyperedge HE-1 (induced by source paper "approximation strategies for incomplete maxsat"):
  with members:
    - "automated synthesis of semantic malware signatures using maximum satisfiability"
    - "generalized totalizer encoding for pseudo boolean constraints"
    - "incremental cardinality constraints for maxsat"
    - "cause clue clauses error localization using maximum satisfiability"

Connected through hyperedge HE-2 (induced by source paper "fuzzy maximum satisfiability"):
  with members:
    - "cause clue clauses error localization using maximum satisfiability"
    - "new inference rules for max sat"
    - "on using unsatisfiability for solving maximum satisfiability"
    - "a logical approach to efficient max sat solving"

Connected through hyperedge HE-3 (induced by source paper "aslib a benchmark library for algorithm selection"):
  with members:
    - "openml networked science in machine learning"
    - "sunny a lazy portfolio approach for constraint solving"
    - "claspfolio 2 advances in algorithm selection for answer set programming"
    - "an enhanced features extractor for a portfolio of constraint solvers"
    - "proteus a hierarchical portfolio of solvers and transformations"
    - "llama leveraging learning to automatically manage algorithms"
    - "algorithm runtime prediction methods evaluation"
    - "algorithm selection for combinatorial search problems a survey"

Connected through hyperedge HE-4 (induced by source paper "generalized totalizer encoding for pseudo boolean constraints"):
  with members:
    - "incremental cardinality constraints for maxsat"
    - "a new look at bdds for pseudo boolean constraints"
    - "algorithms for weighted boolean optimization"

Connected through hyperedge HE-5 (induced by source paper "incremental cardinality constraints for maxsat"):
  with members:
    - "incremental qbf solving"
    - "cause clue clauses error localization using maximum satisfiability"
    - "algorithms for weighted boolean optimization"
    - "on using unsatisfiability for solving maximum satisfiability"

Connected through hyperedge HE-6 (induced by source paper "aligning component upgrades"):
  with members:
    - "handling software upgradeability problems with milp solvers"
    - "on solving boolean multilevel optimization problems"
    - "package upgrades in foss distributions details and challenges"

Connected through hyperedge HE-7 (induced by source paper "aspcud a linux package configuration tool based on answer set programming"):
  with members:
    - "handling software upgradeability problems with milp solvers"
    - "proceedings first international workshop on logics for component configuration"

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)