human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "A Formally Verified Compiler Back-end"
  Abstract: This article describes the development and formal verification (proof of semantic preservation) of a compiler back-end from Cminor (a simple imperative intermediate language) to PowerPC assembly code, using the Coq proof assistant both for programming the compiler and for proving its soundness. Such a verified compiler is useful in the context of formal methods applied to the certification of critical software: the verification of the compiler guarantees that the safety properties proved on the source code hold for the executable compiled code as well.

Connected through hyperedge HE-1 (induced by source paper "A type system for certified binaries"):
  with members:
    - "Safe kernel extensions without run-time checking"
    - "Compiling polymorphism using intensional type analysis"

Connected through hyperedge HE-2 (induced by source paper "A rely-guarantee-based simulation for verifying concurrent program transformations"):
  with members:
    - "Verified Compilation for Shared-Memory C"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science