Posynomial
A posynomial, also known as a posinomial in some literature, is a function of the form
where all the coordinates ![x_i](/Images/godic/202502/04/05e42209d67fe1eb15a055e9d3b3770e1353.png")
and coefficients ![c_k](/Images/godic/202502/04/5183407e82b8ea052755bbd8b1434eb81353.png")
are positive real numbers, and the exponents ![a_{ik}](/Images/godic/202502/04/d9c12e9463a84a0310b5e0f957ba5c051353.png")
are real numbers. Posynomials are closed under addition, multiplication, and nonnegative scaling.