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 "Image Restoration with Discrete Constrained Total Variation Part I: Fast and Exact Optimization"):
  Abstract: This paper deals with the total variation minimization problem in image restoration for convex data fidelity functionals. We propose a new and fast algorithm which computes an exact solution in the discrete framework. Our method relies on the decomposition of an image into its level sets. It maps the original problems into independent binary Markov Random Field optimization problems at each level. Exact solutions of these binary problems are found thanks to minimum cost cut techniques in graphs. These binary solutions are proved to be monotone increasing with levels and yield thus an exact solution of the discrete original problem. Furthermore we show that minimization of total variation under L 1 data fidelity term yields a self-dual contrast invariant filter. Finally we present some results.

Includes members:
  Member "A fast parametric maximum flow algorithm and applications":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "A new approach to the maximum flow problem")
  Member "Efficient Schemes for Total Variation Minimization Under Constraints in Image Processing":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "Convex optimization for multi-class image labeling with a novel family of total variation based regularizers")

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