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 "Elementary proofs of some q-identities of Jackson and Andrews-Jain"):
  Abstract: We present elementary proofs of three q-identities of Jackson. They are Jackson's terminating q-analogue of Dixon's sum, Jackson's q-analogue of Clausen's formula, and a generalization of both of them. We also give an elementary proof of Jain's q-analogue of terminating Watson's summation formula, which is actually equivalent to Andrews's q-analogue of Watson's formula.

Includes members:
  Member "A Combinatorial Proof of a Symmetric $q$-Pfaff-Saalschütz Identity":
    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