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
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
no algebraic roots according to this
theorem: https://en.wikipedia.org/wiki/Abel%E2%80%93Ruffini_theorem
On Tuesday, January 19, 2016 at 8:37:18 PM UTC-6, Junwei Huang wrote:
>
> Hello, I am new to sympy and try to solve the following equation
>
> import sympy as sy
>
actually this case looks like has some special properties and hence has
some roots according to Wolfram:
http://www.wolframalpha.com/input/?i=A*x%5E5%2BB*x%5E4%2BC*x-D%3D0
On Tuesday, January 19, 2016 at 11:41:47 PM UTC-6, Denis Akhiyarov wrote:
>
> no algebraic roots according to this theorem:
11 matches
Mail list logo