- #1

- 2

- 0

[tex]\sum^{n}_{k=1}\frac{\partial^{k}u}{\partial x^{k}}[/tex]

??

THANK YOU

PS. Being able to write LaTeX equations is actually awesome.

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter AOA
- Start date

- #1

- 2

- 0

[tex]\sum^{n}_{k=1}\frac{\partial^{k}u}{\partial x^{k}}[/tex]

??

THANK YOU

PS. Being able to write LaTeX equations is actually awesome.

- #2

CompuChip

Science Advisor

Homework Helper

- 4,302

- 47

When you write it explicitly it looks a bit weird, but I see no objection to using it in such a sum.

- #3

- 2

- 0

OK. I just wanted to make sure. Thanks!

- #4

- 27

- 0

Can I ask what kind of situation you're getting that sum in?

- #5

arildno

Science Advisor

Homework Helper

Gold Member

Dearly Missed

- 9,970

- 134

When dealing with just the first derivative of some function, it is superfluous, but completely analogical to the case that [itex]x=x^{1}[/itex]

Neither of these two notations are "bad" in any way.

- #6

HallsofIvy

Science Advisor

Homework Helper

- 41,833

- 963

[tex]\sum_{k=0}^n \frac{\partial^k u}{\partial x^k}[/tex]

with the understanding that

[tex]\frac{\partial^0 u}{\partial x^0}= u(x)[/tex]

Share: