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 "Lazy explanations for constraint propagators"):
  Abstract: Explanations are a technique for reasoning about constraint propagation, which have been applied in many learning, backjumping and user-interaction algorithms for constraint programming. To date explanations for constraints have usually been recorded “eagerly” when constraint propagation happens, which leads to inefficient use of time and space, because many will never be used. In this paper we show that it is possible and highly effective to calculate explanations retrospectively when they are needed. To this end, we implement “lazy” explanations in a state of the art learning framework. Experimental results confirm the effectiveness of the technique: we achieve reduction in the number of explanations calculated up to a factor of 200 and reductions in overall solve time up to a factor of 5.

Includes members:
  Member "Solving SAT and SAT Modulo Theories: From an abstract Davis--Putnam--Logemann--Loveland procedure to DPLL( T )":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "Potassco: The Potsdam Answer Set Solving Collection")
  Member "Efficient conflict driven learning in a boolean satisfiability solver":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "A new approach to the maximum flow problem")
  Member "Learning When to Use Lazy Learning in Constraint Solving":
    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: Computer science