* Linear Problem (LP)

* Mixed-Integer Linear Problem (MILP)

* Quadratic Problem (QP)

* Non-Linear Problem (NLP)

* Non-Smooth Problem (NSP)

* Non-Linear Solve Problem (NLSP)

* Least Squares Problem (LSP)

* Linear Least Squares Problem (LLSP)

* Mini-Max Problem (MMP)

* Global Problem (GLP)

A variety of solvers is available (e.g. IPOPT, ALGENCAN).