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: "Multi-objective model selection for support vector machines"
  Abstract: In this article, model selection for support vector machines is viewed as a multi-objective optimization problem, where model complexity and training accuracy define two conflicting objectives. Different optimization criteria are evaluated: Split modified radius margin bounds, which allow for comparing existing model selection criteria, and the training error in conjunction with the number of support vectors for designing sparse solutions.

Connected through hyperedge HE-1 (induced by source paper "Covariance Matrix Adaptation for Multi-objective Optimization"):
  with members:
    - "S-metric calculation by considering dominated hypervolume as klee's measure problem"
    - "A novel approach for fuzzy logic PV inverter controller optimization using lightning search algorithm"

Connected through hyperedge HE-2 (induced by source paper "Speeding up backpropagation using multiobjective evolutionary algorithms"):
  with members:
    - "Evolving neural networks through augmenting topologies"

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: Mathematics