- 1.(Matematiikka)annetun funktion osittaisderivaatoista koostuva matriisi
\left(\begin{array}{cccc}\frac{ \partial f_1}{ \partial x_1}& \frac{ \partial f_1}{ \partial x_2}& ...& \frac{ \partial f_1}{ \partial x_n} \\\frac{\partial f_2}{\partial x_1}& \frac{\partial f_2}{\partial x_2}& ...& \frac{\partial f_2}{\partial x_n} \\\vdots & \vdots & & \vdots \\\frac{\partial f_n}{\partial x_1}& \frac{\partial f_n}{\partial x_2}& ...& \frac{\partial f_n}{\partial x_n}\end{array} \right).