[sage-support] Re: Finding symbolic solutions

On Aug 13, 3:07 pm, Rolandb wrote: > The most elementary forms are A + B = A+B, A^2 + B*(A+B) = (A+B)^2 and > (B-A)^2 + 4*A*B = (A+B)^2. You say A + B = A+B. Was that a typo? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to

Re: [sage-support] Re: symbolic calculation with roots of a polynomial of degree >= 5

On Sun, Aug 15, 2010 at 5:00 PM, Nils Bruin wrote: > On Aug 15, 1:40 pm, Philipp Schneider > wrote: >>  Nils, thanks for you answer.> Basically, the answer to "How do I compute >> explicitly with the >> > conjugates of an algebraic number" is "Don't". >> >> Actually I'm just trying to convert an

[sage-support] Re: symbolic calculation with roots of a polynomial of degree >= 5

On Aug 15, 1:40 pm, Philipp Schneider wrote: >  Nils, thanks for you answer.> Basically, the answer to "How do I compute > explicitly with the > > conjugates of an algebraic number" is "Don't". > > Actually I'm just trying to convert an example from mathematica/maple > to sage. Both give me the a

Re: [sage-support] Re: symbolic calculation with roots of a polynomial of degree >= 5

Nils, thanks for you answer. > Basically, the answer to "How do I compute explicitly with the > conjugates of an algebraic number" is "Don't". Actually I'm just trying to convert an example from mathematica/maple to sage. Both give me the answer instantaneously. Mathematica: In[1] := s = Solve[

[sage-support] Re: symbolic calculation with roots of a polynomial of degree >= 5

I got curious how close you can presently get constructing a galois closure. Singular allows you to get part-way there: sage: P.=QQ[] sage: PX.=P[] sage: QQx.=QQ[] sage: gen_cfs=prod((X-r for r in P.gens())).list() sage: F=x^5-3*x-1 sage: spec_cfs=(F).list() sage: rels=[gen_cfs[i]-spec_cfs[i] for

[sage-support] Re: symbolic calculation with roots of a polynomial of degree >= 5

On Aug 15, 10:37 am, Philipp Schneider wrote: > Hi, > > I'm trying to symbolically calculate the product of all roots of the > polynomial x^5 - 3*x -1. > (The answer should of course be 1). > Numerically I can compute the product as follows: > > sage: x = polygen(QQbar) > sage: p=x^5-3*x-1 > sage:

[sage-support] symbolic calculation with roots of a polynomial of degree >= 5

Hi, I'm trying to symbolically calculate the product of all roots of the polynomial x^5 - 3*x -1. (The answer should of course be 1). Numerically I can compute the product as follows: sage: x = polygen(QQbar) sage: p=x^5-3*x-1 sage: p.roots(QQbar) [(-1.214648042698462?, 1), (-0.3347341419433527?,

[sage-support] Derivative of error function

Hi, I can integrate the function exp(-x^2) to get the error function like this: sage: F=integral(exp(-x^2),x); F 1/2*sqrt(pi)*erf(x) But when I try to differentiate the answer, sage does not seem to know the derivative of erf: sage: F.diff(x) 1/2*sqrt(pi)*D[0](erf)(x) I am assuming that the su

[sage-support] Limiting the display range of a 3d plot

Is there any way to limit the display range of a 3d plot, using either jmol or tachyon? (Something similar to xmax and ymax with a 2d plot.) -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.c

[sage-support] Re: 4.5.1 or 4.5.2 for win?

Hi! > > There is a (huge) difference between win version 4.5.1 and 4.5.2. > In version 4.5.1 an external network was setup, so I can use Sage via > Windows Firefox using the address 192.168.236.128. > The 4.5.2 version gives the warning that an external network was not > setup. > Is there an easy