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Re: "+ -" in an output line?


AES/newspost wrote:
> The input
> 
>     In[13]:=
>     Series[-I q s - I p Sqrt[K1^2 - s^2], {s, 0, 1}]
> 
> gives
> 
>     Out[13]=
>     -I Sqrt[K1^2] p + - I q s + O[s^2]
> 
> whereas
> 
>     In[14]:=
>     Series[-I q s - I p Sqrt[K1^2 - s^2], {s, 0, 1}] // Normal
> 
> gives
> 
>     Out[14]=
>     -I Sqrt[K1^2] p - I q s
> 
> What's that "+ -" doing in Out[13] ?  Is this normal?
> 

3.6.2 Advanced Topic: The Representation of Power Series

in the Mathematica book.

-- 
Peter Pein
10245 Berlin


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