Oscar, you need to click on "more roots" in wolfram alpha to see the
algebraic solution, which is definitely confusing.
On Wednesday, January 20, 2016 at 3:55:37 AM UTC-6, Oscar wrote:
>
> On 20 January 2016 at 05:46, Denis Akhiyarov > wrote:
> > On Tuesday, January 19,
On 20 January 2016 at 15:05, Denis Akhiyarov wrote:
>
> Oscar, you need to click on "more roots" in wolfram alpha to see the
> algebraic solution, which is definitely confusing.
Unless I'm misreading all of the additional roots are for the case
where A=0. IOW Wolfram
On 20 January 2016 at 15:11, Aaron Meurer wrote:
> SymPy has algorithms to find roots of quintics in radicals (when they
> exist). I don't recall if the algorithms work for symbolic inputs.
>
> One can take a general quintic (x**5 + a*x**4 + b*x**3 + c*x**2 + d*x + e)
> and
On Wed, Jan 20, 2016 at 10:30 AM, Oscar Benjamin wrote:
> On 20 January 2016 at 15:11, Aaron Meurer wrote:
> > SymPy has algorithms to find roots of quintics in radicals (when they
> > exist). I don't recall if the algorithms work for symbolic
SymPy has algorithms to find roots of quintics in radicals (when they
exist). I don't recall if the algorithms work for symbolic inputs.
One can take a general quintic (x**5 + a*x**4 + b*x**3 + c*x**2 + d*x + e)
and shift it by y (replace x with x - y). Then expand and collect terms in
x. The
I missed A=0 on wolfram, sorry for confusion
On Wed, Jan 20, 2016, 9:38 AM Aaron Meurer wrote:
> On Wed, Jan 20, 2016 at 10:30 AM, Oscar Benjamin <
> oscar.j.benja...@gmail.com> wrote:
>
>> On 20 January 2016 at 15:11, Aaron Meurer wrote:
>> > SymPy has
WolframAlpha is solving for all five variables at once. The roots in
radicals that it gives are when A = 0 (in which case, you have a quartic,
which are solvable in radicals).
Aaron Meurer
On Wed, Jan 20, 2016 at 10:05 AM, Denis Akhiyarov wrote:
> Oscar, you need to
On Wednesday, January 20, 2016 at 4:37:18 AM UTC+2, Junwei Huang wrote:
>
> Hello, I am new to sympy and try to solve the following equation
>
> import sympy as sy
> A,B,C,D,x=sy.var('A,B,C,D,x',positive=True)
> sy.solve(A*x**5+B*x**4+C*x-D,x)
>
> but got no result. There are no roots, or I used
I saw under http://docs.sympy.org/dev/tutorial/simplification.html#powsimp
that it is impossible to combine radicals using powersimp:
"This means that it will be impossible to undo this identity with powsimp(),
because even if powsimp() were to put the bases together, they would be
Looks neat. I will have to delve into it more. Thanks!
On 01/16/2016 06:37 PM, brombo wrote:
You may want to look at my geometric algebra module that uses sympy
(github.com/brombo/galgebra) and see if it does what you want it to.
I have attached the manual (galgebra.pdf) for you to look at.
I like that :-) That's probably actually all I need for this case
On 01/18/2016 10:36 AM, Francesco Bonazzi wrote:
On Friday, 15 January 2016 17:04:20 UTC+1, Alexander Lindsay wrote:
and carry them around in expressions that way because I want to
*avoid* simplifications like (C is
On 20 January 2016 at 05:46, Denis Akhiyarov wrote:
> On Tuesday, January 19, 2016 at 11:41:47 PM UTC-6, Denis Akhiyarov wrote:
>>
>> no algebraic roots according to this theorem:
>> https://en.wikipedia.org/wiki/Abel%E2%80%93Ruffini_theorem
The theorem only shows that
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