### Author Topic: Math Notation Question  (Read 442 times)

#### Jiaqi Bi

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##### Math Notation Question
« on: January 23, 2021, 10:53:54 AM »
For example, I am solving an equation that leads me to this step: $u_x=e^u\cdot g(x)$,
Should I use $\frac{\partial u}{\partial x}$ as my left-hand side or use $\frac{du}{dx}$?

#### Victor Ivrii

it depends: if $u=u(x)$ you can use either. If $u=u(x,y)$ then only partial derivative would be correct.