2009/10/31 <wxu...@sohu.com>:
>
> I am so sorry. I just typed the bracket wrong.
>
> how can I delete the email?
You don't have to. Moreover, it's probably a common mistake first
time users (especially users of Mathematica) might make, so I think it
is valuable to have in the archive.
>
>
> 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!
>>
>>
>> >
>>
>>
>
>
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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