Calculus, Artificial Intelligence, Blogging.
the concavity. For the curve f(x) = x²-x , the derivative function is f`(x) = 2x -1 (Note: f`(x) is a function as the value changes based on the x value). The red curve is flat at x = 0.5 so the blue gradient curve is at zero for that x- value. So the stationary point of a curve can be found by