gradient symbol in LaTeX

 

 

$$\nabla u$$

 

$$\nabla u$$

 

 

$$
\nabla f(\left.x_{1}, x_{2}, \ldots, x_{n}\right)=\left[\begin{array}{c}
\dfrac{\partial f}{\partial x_1}(\left.x_{1}, x_{2}, \ldots, x_{n}\right)\\
\dfrac{\partial f}{\partial x_2}(\left.x_{1}, x_{2}, \ldots, x_{n}\right) \\
\vdots \\
\dfrac{\partial f}{\partial x_n}(\left.x_{1}, x_{2}, \ldots, x_{n}\right) 
\end{array}\right]
$$

 

$$
\nabla f(\left.x_{1}, x_{2}, \ldots, x_{n}\right)=\left[\begin{array}{c}
\dfrac{\partial f}{\partial x_1}(\left.x_{1}, x_{2}, \ldots, x_{n}\right)\\
\dfrac{\partial f}{\partial x_2}(\left.x_{1}, x_{2}, \ldots, x_{n}\right) \\
\vdots \\
\dfrac{\partial f}{\partial x_n}(\left.x_{1}, x_{2}, \ldots, x_{n}\right) 
\end{array}\right]
$$

 

 

https://www.math-linux.com/latex/faq/latex-faq/article/latex-gradient-symbol