Le 10/07/2012 21:58, William Stein a écrit :
On Tue, Jul 10, 2012 at 11:01 AM, Martin Raum
wrote:
Hallo all!
I have found the following bug which mostly occurs when substituting power
series over inexact rings. E.g.
R. = CC[[]]
x.subs(x = x**2)
gives x. Same for the base field Qp(7).
Qui
On Tue, Jul 10, 2012 at 11:01 AM, Martin Raum
wrote:
> Hallo all!
>
> I have found the following bug which mostly occurs when substituting power
> series over inexact rings. E.g.
>
> R. = CC[[]]
> x.subs(x = x**2)
>
> gives x. Same for the base field Qp(7).
Quick remark. It is far, far better to
> The reason is that the generic method subs iterates the generators of R
> (in this case x) and checks whether any keyword matches the string
> representation of that generator. But
>
> x._repr_()
>
> does not give 'x', but 0.0... + 1.0... x.
>
> There are two obvious ways to fix this: Change _rep
Hallo all!
I have found the following bug which mostly occurs when substituting power
series over inexact rings. E.g.
R. = CC[[]]
x.subs(x = x**2)
gives x*. *Same for the base field Qp(7).
The reason is that the generic method subs iterates the generators of R (in
this case x) and checks whet
