William asked me to forward his reply...
(One remark: William always developed for Axiom. In Sage, the variant
of Axiom usually provided is FriCAS. To the best of my knowledge, all
libraries developed for Axiom is provided by FriCAS as well.)
"William Sit" writes:
> Dear Martin:
>
> I just n
On Wed, Jul 29, 2009 at 11:27 PM, Minh Nguyen wrote:
>
> Hi Offray,
>
> On Thu, Jul 30, 2009 at 8:23 AM, Offray Vladimir Luna
> Cárdenas wrote:
>>
>> Hi,
>>
>> Two students are interested in making the graph of the black body[1][2]
>> with Sage and making it interactive in the web. [2] contains, a
Hi,
could someone help me to plot the function
def f(x,y):
if x<=y:
return x*(1-y)
elif y<=x:
return y*(1-x)
for 0<=x,y<=1 in 2D?
Thanks in advance.
--~--~-~--~~~---~--~~
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T
sage: density_plot(f, (0,1), (0,1))
looks like an adequate visualization in 2d.
h
On Jul 30, 5:04 pm, surfer wrote:
> Hi,
>
> could someone help me to plot the function
>
> def f(x,y):
> if x<=y:
> return x*(1-y)
> elif y<=x:
> return y*(1-x)
>
> for 0<=x,y<=1 in 2D?
>
>
> sage: density_plot(f, (0,1), (0,1))
> looks like an adequate visualization in 2d.
thanks it looks pretty, but i would like to have a curve.
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To unsubscribe from this group, s
Suppose that q is a prime power, and I have an elliptic curve E over GF
(q)
(say created by E = EllipticCurve(coefficient_list))
and P,Q = E.gens()
How can I find E just given P (say if I pass just P to a function)?
If I say
print P.parent()
I get something like
Abelian group of point on Ell
On Thu, Jul 30, 2009 at 8:51 AM, VictorMiller wrote:
>
> Suppose that q is a prime power, and I have an elliptic curve E over GF
> (q)
> (say created by E = EllipticCurve(coefficient_list))
>
> and P,Q = E.gens()
>
> How can I find E just given P (say if I pass just P to a function)?
>
> If I say
Hello everyone
The following small example draws the function in such a way that it
"suggest" that f is negative between 0.8 and 1.
var('x')
f(x)=x+1/sqrt(x)
plot(f,(0,2))
Indeed, the X axis is drawn at y=2.
Since nothing warn that behavior, it is quite disturbing.
Is it willing ?
I think tha
On Jul 30, 1:05 pm, Laurent wrote:
> Hello everyone
>
> The following small example draws the function in such a way that it
> "suggest" that f is negative between 0.8 and 1.
>
> var('x')
> f(x)=x+1/sqrt(x)
> plot(f,(0,2))
>
> Indeed, the X axis is drawn at y=2.
> Since nothing warn that behavi
Hi,
How can I unsubscribe from sage-support?
--
Craig Pellegrini
Department of Physics
University of Illinois at Chicago
(312) 996-1323
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Read the bottom of the email you just posted (or any other email posted
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On Thu, Jul 30, 2009 at 3:11 PM, Craig Pellegrini wrote:
>
> Hi,
>
> How can I unsubscribe from sage-support?
On Thu, Jul 30, 2009 at 12:11 PM, Craig Pellegrini wrote:
>
> Hi,
>
> How can I unsubscribe from sage-support?
You should also be able to edit your membership here:
http://groups.google.com/group/sage-support
E.g., you could stay subscribed (so you can post), but elect to read all
messages
Hi!
On Jul 28, 3:15 am, William Stein wrote:
...
> > in _expect_expression. So, perhapsRisn't involved, but it is just a
> > misleading warning message?
>
> It is a bug in the warning message indeed, in line 820.
>
> > Do you think I should post a ticket, changing it into "Control-C
> > pressed.
I don't understand the question. Do you want a contour plot? An implicit plot?
On Thu, Jul 30, 2009 at 11:30 AM, surfer wrote:
>> sage: density_plot(f, (0,1), (0,1))
>
>> looks like an adequate visualization in 2d.
>
> thanks it looks pretty, but i would like to have a curve.
>
>
>
> >
>
--~--~
sorry, I would like to obtain the curve for fixed x in (0,1). (or for fixed
y in (0,1)).
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>
> and that sometimes the graph might be "busy" in any particular
> location one chose. Some users might also find the labeling of axes
> distracting. Anyway, please let us know what your ideas would be.
>
* For me, it would be satisfactory to draw the X axis in grey instead of
black when
On Jul 30, 2009, at 2:01 PM, Laurent wrote:
>
>
>>
>> and that sometimes the graph might be "busy" in any particular
>> location one chose. Some users might also find the labeling of axes
>> distracting. Anyway, please let us know what your ideas would be.
>>
> * For me, it would be satisfactor
I just did a test of SAGE versus Magma on the same computer.
I had a finite field GF(19991^2), and timed generating a random
element in SAGE and in Magma.
I found, much to my surprise, that Magma was a factor of 7 times
faster. Does anyone know what
method they use?
Victor
--~--~-~--~-
I think this is with y = 1/4:
sage: h = Piecewise([[(0,1/4),3*x/4],[(1/4,1),(1-x)/4]])
sage: h.plot()
On Thu, Jul 30, 2009 at 4:45 PM, surfer wrote:
> sorry, I would like to obtain the curve for fixed x in (0,1). (or for fixed
> y in (0,1)).
>
> >
>
--~--~-~--~~~---
On Jul 30, 2009, at 2:50 PM, VictorMiller wrote:
> I just did a test of SAGE versus Magma on the same computer.
>
> I had a finite field GF(19991^2), and timed generating a random
> element in SAGE and in Magma.
> I found, much to my surprise, that Magma was a factor of 7 times
> faster. Does an
Thanks, I found that it even gets much worse with a bigger finite
field.
For example if p = next_prime(100)
and I try the same experiment in GF(p^2), Magma is over 100 times
faster!
Victor
On Jul 30, 6:07 pm, Robert Bradshaw
wrote:
> On Jul 30, 2009, at 2:50 PM, VictorMiller wrote:
>
> >
I'm not surprised. These fields should be written to use NTL as a
backend directly (and probably using the same ideas as polynomial
template, and there's enough finite fields that they should probably
be put into their own directory while all the re-factoring is going
on...) but no one's f
On Jul 30, 5:17 pm, Robert Bradshaw
wrote:
> On Jul 30, 2009, at 2:01 PM, Laurent wrote:
>
>
>
> >> and that sometimes the graph might be "busy" in any particular
> >> location one chose. Some users might also find the labeling of axes
> >> distracting. Anyway, please let us know what your id
Hi,
Bill Page escribió:
>> [ x ] No, I can read the above just fine. It is crystal clear.
>>
>
> ... but of course unnecessarily verbose. In my opinion a more common
> notation in Sage:
>
> sage: x=2*vector(range(10))+vector(10*[3])
> sage: list_plot(map(lambda a:[cos(a),sin(a)],x/max(x)))
Laurent wrote:
>
>> and that sometimes the graph might be "busy" in any particular
>> location one chose. Some users might also find the labeling of axes
>> distracting. Anyway, please let us know what your ideas would be.
>>
> * For me, it would be satisfactory to draw the X axis in grey in
On Jul 30, 10:45 pm, surfer wrote:
> sorry, I would like to obtain the curve for fixed x in (0,1). (or for fixed
> y in (0,1)).
A general solution is to return a function of only one axis. For
example, for a constant y you can do the following:
def slice_y(y):
def g(x):
return f
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