# Order notation

1. May 14, 2014

### Juggler123

Hi,

Is there a better way to write this?

'terms of order $O(R^{-Y})$ where $Y>1$ are neglected'

I feel like this is a bit clumsy.

Thanks for the help!

2. May 14, 2014

### Simon Bridge

3. May 14, 2014

### Juggler123

Yeah that's correct, if I am understanding little 'o' notation correctly I believe it's equivalent to write:

'terms of order $o(R^{-1})$ are neglected'

4. May 14, 2014

### Simon Bridge

It is simpler to write it in terms of what orders you will accept.
Note, you wanted Y>1, so Y=1 (order -1) was accepted.

Take terms in (1/R) to 1st order.