On 05/07/2015 11:19 AM, Douglas Davis wrote:
> Is there a way to convert a symbolic result from using rational expressions
> and constants to the corresponding expression using reals?
>
> For example if I have a result of
>
> -15/28*2^(2/3)*a*hh^2+32/pi*b^3
>
> I need to convert it to
>
> -0.8
On Thursday, 7 May 2015 21:04:36 UTC+1, Douglas Davis wrote:
>
> Is there a way to convert a symbolic result from using rational
> expressions and constants to the corresponding expression using reals?
>
> For example if I have a result of
>
> -15/28*2^(2/3)*a*hh^2+32/pi*b^3
>
> I need to conver
Is there a way to convert a symbolic result from using rational expressions
and constants to the corresponding expression using reals?
For example if I have a result of
-15/28*2^(2/3)*a*hh^2+32/pi*b^3
I need to convert it to
-0.85039*a*hh^2 + 10.186*b^3
Anything I try I gives "cannot evaluat
In my limited experience it is best to let Sage handle the symbolic
computations explicitly. Then specify sympy ( algorithm='sympy') as a
check on important solutions or when the default gives an error. When
working on advanced problems it is always best to have a backup and a check
on your
> after updating to sage-6.5, I always get a blank page when I open the
> worksheet in browser (it works well when I use terminal). can anyone help?
>
I recommend doing what is called a "hard cache reset". That means clearing
your browser of all files (including, in particular, javascript) r
On Thu, 7 May 2015, Dima Pasechnik wrote:
nobody really knows how to solve systems of (non-polynomial) equations in
general.
There are heuristics implemented in various systems...
What of those are built-in in Sage?
--
Jori Mäntysalo
I was asked where
f(n,k)=(binomial(2*n + 2, n + 1) / 2 - binomial(2*n, n) - sum(binomial(n, k) *
binomial(n, k-1), k,1,n))
f.full_simplify()
got magic constant sqrt(pi). Right answer is zero.
--
Jori Mäntysalo
On 06/05/15 14:55, Paul Royik wrote:
> For example,
> x^5+y^5=7
> x*sin(y)=1
Newton method is perfectly fine here
var('x,y')
f(x,y) = x^5 + y^5 - 7
g(x,y) = x*sin(y) - 1
F(x,y) = (f, g)
m = F.derivative()
V = VectorSpace(RDF, 2)
v = V((2,2))
for _ in range(10):
fv = F(*v)
v = V(m(*v).so
upgrade to 6.6, to begin with...
On Thursday, 7 May 2015 09:10:16 UTC+1, oo8oo wrote:
>
> after updating to sage-6.5, I always get a blank page when I open the
> worksheet in browser (it works well when I use terminal). can anyone help?
>
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On Wednesday, 6 May 2015 07:27:36 UTC+1, Paul Royik wrote:
>
> How can this be applied to systems?
>
nobody really knows how to solve systems of (non-polynomial) equations in
general.
There are heuristics implemented in various systems...
>
> On Wednesday, May 6, 2015 at 1:28:55 AM UTC+3, Di
after updating to sage-6.5, I always get a blank page when I open the
worksheet in browser (it works well when I use terminal). can anyone help?
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After updating the sage to sage-6.5 on a mac, sage can not start. It always
gives me a blank page (without any words) on http://localhost:8080/. (It
works fine if I use terminal) Anyone can help me? 3x!
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