For a two-variable problem with two constraints, see lesson1.py.
For a second-degree polynomial without constraints, see lesson2.py.
f(x)= 2x^2 - 4x - 2
For a fourth-degree polynomial without constraints, see lesson3.py.
Even though the package name "cvxpy" implies convex problems, it can also find the minimum of concave functions like this fourth-degree polynomial:
f(x) = 4x^4 + 8x^3 + x^2 - 4x - 2
