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ppauper
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Joined: November 15th, 2001, 1:29 pm

### Re: Inline math

ddots  $\ddots$

Cuchulainn
Posts: 58064
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
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### Re: Inline math

$\frac{dU}{dt} = \sum\limits_ {i=1}^n A_i U$ (1)

or even

$\frac{\partial U}{\partial t} = \sum\limits_ {i=1}^n A_i U$ (2)

$\frac{dU}{dt} = \sum_ {i=1}^n A_i U$ (3)
Last edited by Cuchulainn on March 8th, 2018, 9:01 pm, edited 4 times in total.

ppauper
Posts: 70239
Joined: November 15th, 2001, 1:29 pm

### Re: Inline math

I was wondering what "\ limits" does, but it seems it puts the limits directly below and above the Sigma rather than to the right

Cuchulainn
Posts: 58064
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
Contact:

### Re: Inline math

I was wondering what "\ limits" does, but it seems it puts the limits directly below and above the Sigma rather than to the right
Yes. I find form (1) more compact and is probably less error-prone when proof-reading and mapping to code (just a feeling).

$\frac{dU}{dt} = \sum_ {i=1}^n A_i U$ (3)

Einstein had his own summation notation

$\frac{dU}{dt} = A_i U$ (4)

but I suppose we all can't be Einstein so stick to the long-winded (but 100% unambiguous) version.

Cuchulainn
Posts: 58064
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
Contact:

### Re: Inline math

$\mid x \mid$
$|x |^{2}$

Seems a bit long-winded.