A set of sample problems in unconstrained optimization is given by loading Optimization`UnconstrainedProblems` and evaluating $FindMinimumProblems.
Unconstrained Optimization
See also
Linear Programming, Nonlinear Programming, Operations Research, Optimization, Optimization Theory, Stochastic OptimizationCite this as:
Weisstein, Eric W. "Unconstrained Optimization." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/UnconstrainedOptimization.html