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 "Freedom of choice: the leximax criterion in the infinite case"):
  Abstract: Abstract   Many recent works have investigated the problem of extending a preference over a set of alternatives to its power set, in an attempt to provide a formal representation of the notion of freedom of choice. In general, results are limited to the finite case, which excludes, for instance, the case of economic environments. This paper deals with the possibility of extending those results to the context where the basic set of alternatives is the  n -dimensional Euclidean space. We present an extension of the leximax criterion described by Bossert et al. [J. Econ. Ther. 63 (1994) 326] to this more general framework.

Includes members:
  Member "Set comparisons in a general domain: the Indirect Utility Criterion":
    also connected through other hyperedges:
      (none)

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: Mathematics