I am so sorry. I just typed the bracket wrong.
how can I delete the email?
wxu...@sohu.com 写道:
> Hi, all
>
>
> I typed the followings,
>
> var('f,A,p,m')
>
> f=A*p*(1+p)^m/[(1+p)^m-1]
>
>
> but it produced a error as follows,
>
> TypeError: unsupported operand parent(s) for '/': 'Symbolic Ring' and
> '<type 'list'>'
>
>
> I am not clear about that. what is wrong?
>
> Thanks in advance!
>
>
> >
>
>
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