How to convert a powerseries to a vector

[Zhibin Liang]

Dear all,

F.<T>=PowerSeriesRing(ZZ)
f=(1+T^3).O(4)
f.coefficients()

Then it turns out : [0,1]

But I really want [1,0,0,1]

How to realize this?



--

Very best wishes
Zhibin Liang






Building 104 Room 103
Nanhudongyuanyiqu
Wangjing, Chaoyang District
Beijing China,
100102

[John Cremona]

On 4 October 2012 13:51, Zhibin Liang <lian...@gmail.com> wrote:
> Dear all,
>
> F.<T>=PowerSeriesRing(ZZ)
> f=(1+T^3).O(4)
> f.coefficients()
>
> Then it turns out : [0,1]
>
> But I really want [1,0,0,1]
>
> How to realize this?
>

sage: list(f)
[1, 0, 0, 1]

list() will use the iterator function which in turn uses the
subscripting operator:

sage: f[0], f[1], f[2], f[3]
(1, 0, 0, 1)

John

>
>
> --
>
> Very best wishes
> Zhibin Liang
>
>
>
>
>
>
> Building 104 Room 103
> Nanhudongyuanyiqu
> Wangjing, Chaoyang District
> Beijing China,
> 100102
>

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