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: "Vortex: an optimizing compiler for object-oriented languages"
  Abstract: Previously, techniques such as class hierarchy analysis and profile-guided receiver class prediction have been demonstrated to greatly improve the performance of applications written in pure object-oriented languages, but the degree to which these results are transferable to applications written in hybrid languages has been unclear. In part to answer this question, we have developed the Vortex compiler infrastructure, a language-independent optimizing compiler for object-oriented languages, with front-ends for Cecil, C++, Java, and Modula-3. In this paper, we describe the Vortex compiler's intermediate language, internal structure, and optimization suite, and then we report the results of experiments assessing the effectiveness of different combinations of optimizations on sizable applications across these four languages. We characterize the benchmark programs in terms of a collection of static and dynamic metrics, intended to quantify aspects of the "object-orientedness" of a program.

Connected through hyperedge HE-1 (induced by source paper "TIL: a type-directed optimizing compiler for ML"):
  with members:
    - "Safe kernel extensions without run-time checking"
    - "Compiling polymorphism using intensional type analysis"
    - "Type-preserving compilation of Featherweight Java"
    - "Type-Preserving Flow Analysis and Interprocedural Unboxing (Extended Version)"

Connected through hyperedge HE-2 (induced by source paper "Composing dataflow analyses and transformations"):
  with members:
    - "Combining abstract interpreters"

Connected through hyperedge HE-3 (induced by source paper "Accurate indirect branch prediction"):
  with members:
    - "BTB Energy Reduction by Focusing on Useless Accesses"

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