[sage-support] Question regarding normalization of modular symbols.

Hello, I have been computing modular symbols for distinct curves on the Cremona data base. But, in a few curves, I recived a WARNING messages like this: Warning : Could not normalize the modular symbols, maybe all further results will be multiplied by -1, 2 or -2. Why sage does not give the

[sage-support] Re: Unable to launch SageMath 7.4 on macOS Sierra (10.12.1)

I have downloaded SageMath 7.3, and it runs on macOS 10.12 Sierra. I have found that the file signals.so has the same size on SageMath 7.4 and on SageMath 7.3. But, with a file comparison checker, we can see that *the file signals.so has differences between SageMath 7.3 and SageMath 7.4.* The

[sage-support] Re: Unable to launch SageMath 7.4 on macOS Sierra (10.12.1)

Thats likely https://trac.sagemath.org/ticket/21772 Compiling Sage from source should work for you. On Tuesday, November 8, 2016 at 1:53:12 AM UTC+1, quark67000 wrote: > > I have downloaded *sage-7.4-OSX_10.11.6-x86_64.app.dmg* (I'm under macOS > 10.12.1), and installed the app on the

Re: [sage-support] How could I import igraph or python-igraph in the python bundled with sage?

For completeness, a related question was asked on Ask Sage at: https://ask.sagemath.org/question/35464/what-packages-in-sage-can-i-use-in-python/ -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving

[sage-support] Re: Solve gives incorrect solutions for polynomial

Sun 2016-11-06 16:00:30 UTC+1, Francis Banks: > I am solving a polynomial which arises from plotting titration cures > in chemistry. The rule of signs suggests it has one positive root. > Find_root seems to find it. Solve with poly_solve=true does not. > Instead it gives 4 complex roots, which

Re: [sage-support] How could I import igraph or python-igraph in the python bundled with sage?

Thanks, I understand. 在 2016年11月7日星期一 UTC+1下午7:35:10，Dima Pasechnik写道： > > > > On Monday, November 7, 2016 at 2:12:14 PM UTC, Eden Harder wrote: >> >> Thanks for you reply. I know import igraph works in sage. But I have >> installed two different packages: igraph and python_igraph. And what I

Re: [sage-support] Re: Stange behavior with QQbar[z]

On 8 November 2016 at 11:28, Thierry Dumont wrote: > Le 08/11/2016 à 11:05, Vincent Delecroix a écrit : >> On 8 November 2016 at 10:17, Thierry Dumont >> wrote: >>> Le 08/11/2016 à 08:43, Vincent Delecroix a écrit : Concerning

Re: [sage-support] Re: Stange behavior with QQbar[z]

Le 08/11/2016 à 11:05, Vincent Delecroix a écrit : > On 8 November 2016 at 10:17, Thierry Dumont > wrote: >> Le 08/11/2016 à 08:43, Vincent Delecroix a écrit : >>> Concerning representation of algebraic numbers, it is printed as an >>> exact rational if and only if it

Re: [sage-support] Re: Stange behavior with QQbar[z]

On 8 November 2016 at 10:17, Thierry Dumont wrote: > Le 08/11/2016 à 08:43, Vincent Delecroix a écrit : >> Concerning representation of algebraic numbers, it is printed as an >> exact rational if and only if it is stored as an exact rational. It >> will be if the

Re: [sage-support] Re: Stange behavior with QQbar[z]

Le 08/11/2016 à 08:43, Vincent Delecroix a écrit : > Concerning representation of algebraic numbers, it is printed as an > exact rational if and only if it is stored as an exact rational. It > will be if the method exactify has been called on the underlying > representation of the number. Here is