FTP, identify this mathematical operation which according to the Fundamental Theorem of Calculus is the inverse process of integration.
The Hessian matrix has entries which have undergone this operation twice and Clairaut's theorem states that for a function of many variables, the order of performing this operation does not matter. The dot product of a unit vector and a gradient of a function is known as the 'directional' variety of this operation. For a natural logarithm, this operation is equal to the quantity one over (*) x.  Setting this operation equal to zero allows one to find the extreme values of a function and this operation gives the slope of the function at any point. FTP, identify this mathematical operation which according to the Fundamental Theorem of Calculus is the inverse process of integration.
The Hessian matrix has entries which have undergone this operation twice and Clairaut's theorem states that for a function of many variables, the order of performing this operation does not matter.
{differentiation} or taking the {derivative} [accept other word forms]