human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge groups authors who co-authored the same paper.

Details of the hypergraph:
Center hyperedge (induced by source paper "Type-preserving compilation of Featherweight Java"):
  Abstract: We present an efficient encoding of core Java constructs in a simple, implementable typed intermediate language. The encoding, after type erasure, has the same operational behavior as a standard implementation using vtables and self-application for method invocation. Classes inherit super-class methods with no overhead. We support mutually recursive classes while preserving separate compilation. Our strategy extends naturally to a significant subset of Java, including interfaces and privacy. The formal translation using Featherweight Java allows comprehensible type-preservation proofs and serves as a starting point for extending the translation to new features. Our work provides a foundation for supporting certifying compilation of Java-like class-based languages in a type-theoretic framework.

Includes members:
  Member "Safe kernel extensions without run-time checking":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "TIL: a type-directed optimizing compiler for ML")
  Member "Featherweight Java: a minimal core calculus for Java and GJ":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "Safe composition of product lines")
  Member "Compiling polymorphism using intensional type analysis":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "TIL: a type-directed optimizing compiler for ML")
  Member "TIL: a type-directed optimizing compiler for ML":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "Compiling polymorphism using intensional type analysis")

Question: Please tell me which research area the co-authored paper (i.e., the source paper of the center hyperedge) belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science