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: "an empirical comparison of dependency network evolution in seven software packaging ecosystems"
  Abstract: Nearly every popular programming language comes with one or more package managers. The software packages distributed by such package managers form large software ecosystems. These packaging ecosystems contain a large number of package releases that are updated regularly and that have many dependencies to other package releases. While packaging ecosystems are extremely useful for their respective communities of developers, they face challenges related to their scale, complexity, and rate of evolution. Typical problems are backward incompatible package updates, and the risk of (transitively) depending on packages that have become obsolete or inactive. This manuscript uses the libraries.io dataset to carry out a quantitative empirical analysis of the similarities and differences between the evolution of package dependency networks for seven packaging ecosystems of varying sizes and ages: Cargo for Rust, CPAN for Perl, CRAN for R, npm for JavaScript, NuGet for the .NET platform, Packagist for PHP, and RubyGems for Ruby. We propose novel metrics to capture the growth, changeability, resuability and fragility of these dependency networks, and use these metrics to analyse and compare their evolution. We observe that the dependency networks tend to grow over time, both in size and in number of package updates, while a minority of packages are responsible for most of the package updates. The majority of packages depend on other packages, but only a small proportion of packages accounts for most of the reverse dependencies. We observe a high proportion of fragile packages due to a high and increasing number of transitive dependencies. These findings are instrumental for assessing the quality of a package dependency network, and improving it through dependency management tools and imposed policies.

Connected through hyperedge HE-1 (induced by source paper "interactive effort aware library version harmonization"):
  with members:
    - "small world with high risks a study of security threats in the npm ecosystem"
    - "on the evolution of technical lag in the npm package dependency network"
    - "why and how java developers break apis"
    - "beyond metadata code centric and usage based analysis of known vulnerabilities in open source software"
    - "thou shalt not depend on me analysing the use of outdated javascript libraries on the web"
    - "an empirical study on the impact of refactoring activities on evolving client used apis"
    - "an investigation into the use of common libraries in android apps"
    - "impact assessment for vulnerabilities in open source software libraries"

Connected through hyperedge HE-2 (induced by source paper "a comprehensive study of bloated dependencies in the maven ecosystem"):
  with members:
    - "analyzing 2 3 million maven dependencies to reveal an essential core in apis"
    - "the emergence of software diversity in maven central"
    - "polydroid learning driven specialization of mobile applications"
    - "learning api usages from bytecode a statistical approach"

Connected through hyperedge HE-3 (induced by source paper "small world with high risks a study of security threats in the npm ecosystem"):
  with members:
    - "on the evolution of technical lag in the npm package dependency network"
    - "on the impact of micro packages an empirical study of the npm javascript ecosystem"
    - "an empirical comparison of developer retention in the rubygems and npm software ecosystems"
    - "extracting insights from the topology of the javascript package ecosystem"
    - "thou shalt not depend on me analysing the use of outdated javascript libraries on the web"
    - "exposing the hidden web an analysis of third party http requests on 1 million websites"

Connected through hyperedge HE-4 (induced by source paper "analyzing 2 3 million maven dependencies to reveal an essential core in apis"):
  with members:
    - "the emergence of software diversity in maven central"
    - "vulnerable open source dependencies counting those that matter"
    - "learning api usages from bytecode a statistical approach"
    - "empirical evidence of large scale diversity in api usage of object oriented software"

Connected through hyperedge HE-5 (induced by source paper "the emergence of software diversity in maven central"):
  with members:
    - "on the diversity of software package popularity metrics an empirical study of npm"
    - "the maven dependency graph a temporal graph based representation of maven central"
    - "vulnerable open source dependencies counting those that matter"
    - "the multiple facets of software diversity recent developments in year 2000 and beyond"

Connected through hyperedge HE-6 (induced by source paper "on the diversity of software package popularity metrics an empirical study of npm"):
  with members:
    - "what s in a github star understanding repository starring practices in a social coding platform"
    - "understanding the factors that impact the popularity of github repositories"

Connected through hyperedge HE-7 (induced by source paper "breaking the borders an investigation of cross ecosystem software packages"):
  with members:
    - "on the evolution of technical lag in the npm package dependency network"
    - "an empirical comparison of developer retention in the rubygems and npm software ecosystems"

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.SE(Software Engineering)