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: "AI’s War on Manipulation: Are We Winning?"
  Abstract: We provide an overview of more than two decades of work, mostly in AI, that studies computational complexity as a barrier against manipulation in elections.

Connected through hyperedge HE-1 (induced by source paper "Strategyproof approximations of distance rationalizable voting rules"):
  with members:
    - "Universal voting protocol tweaks to make manipulation hard"

Connected through hyperedge HE-2 (induced by source paper "An NTU cooperative game theoretic view of manipulating elections"):
  with members:
    - "Coalitional voting manipulation: a game-theoretic perspective"

Connected through hyperedge HE-3 (induced by source paper "Coalitional voting manipulation: a game-theoretic perspective"):
  with members:
    - "An NTU cooperative game theoretic view of manipulating elections"

Connected through hyperedge HE-4 (induced by source paper "Universal voting protocol tweaks to make manipulation hard"):
  with members:
    - "Computing shapley values, manipulating value division schemes, and checking core membership in multi-issue domains"
    - "Vote elicitation: complexity and strategy-proofness"
    - "Strategyproof approximations of distance rationalizable voting rules"
    - "On merging strategy-proofness"

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