How to write gradient symbol in Latex ? The gradient of a differentiable function f of several variables is the vector field whose components are the partial derivatives of f

Write gradient symbol in Latex

You can use the default math mode with \nabla function:

$$\nabla u$$
\[\nabla u\]

More examples gradient symbol in Latex

Let’s write the mathematical definition

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

Have a look to gradient conjugate algorithm.