Rosenbrock function
= Rosenbrock function
{wiki=Rosenbrock_function}
The Rosenbrock function, often referred to as the Rosenbrock's valley or Rosenbrock's banana function, is a non-convex function used as a performance test problem for optimization algorithms. It is defined in two dimensions as: \\\[ f(x, y) = (a - x)^2 + b(y - x^2)^2 \\\] where \\(a\\) and \\(b\\) are constants.