### Author Topic: Math Notation Question  (Read 621 times)

#### Jiaqi Bi

• Jr. Member
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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

• Elder Member
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##### Re: Math Notation Question
« Reply #1 on: January 24, 2021, 07:56:05 AM »
it depends: if $u=u(x)$ you can use either. If $u=u(x,y)$ then only partial derivative would be correct.
« Last Edit: January 26, 2021, 11:58:30 AM by Victor Ivrii »