On Thursday, May 17, 2012 1:52:38 AM UTC-4, ketchers wrote:
I don't know how to get sage to understand domain : complex so I tried
with assume and here is what happened. Does it make sense?
Yes, it does. Our assumptions go through Maxima, and apparently assuming a
variable is
https://lh6.googleusercontent.com/-BDfI2b3v4HA/T7SRx5zaqBI/AGo/Q6NEGFw8xQw/s1600/Screenshot+from+2012-05-17+00%3A50%3A25.png
I don't know how to get sage to understand domain : complex so I tried
with assume and here is what happened. Does it make sense?
On Sunday, May 13, 2012
On 2012-05-14, JamesHDavenport j.h.davenp...@bath.ac.uk wrote:
It may be branch cut strangeness, but if so it is very strange. The
integrand is clearly well-behaved, and the integral,
while in terms of the incomplete gamma function, seems to be off the usual
branch cut (negative real axis).
It may be branch cut strangeness, but if so it is very strange. The
integrand is clearly well-behaved, and the integral,
while in terms of the incomplete gamma function, seems to be off the
usual
branch cut (negative real axis).
Try domain:complex before calling integrate; that
On Tuesday, May 15, 2012 2:36:34 AM UTC-4, Keshav Kini wrote:
John H Palmieri jhpalmier...@gmail.com writes:
This works for me:
sage: numerical_integral(x*cos(x^3), 0, 0.5)
(0.1247560409610376, 1.3850702913602309e-15)
Interesting...
sage:
On 2012-05-15, kcrisman kcris...@gmail.com wrote:
(%i3) domain:complex;
(%o3) complex
(%i4) integrate(x*cos(x^3),x,0,1/2);
(%o4)
gamma_incomplete(2/3,%i/8)/6+gamma_incomplete(2/3,-%i/8)/6-gamma(2/3)/3
Hmm. I get a different result. I am using the current Git version.
domain : complex;
On 5/15/12 8:33 PM, Keshav Kini wrote:
And maybe that's why plot3d(), unlike plot(), does
seem to generate the deprecation warning.
Sorry---what plot command doesn't generate a deprecation warning?
Thanks,
Jason
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This is now http://trac.sagemath.org/sage_trac/ticket/12947. We've had
some issues with incomplete gamma functions translating properly in the
past, and/or errors in Maxima, but I didn't have time to either look into
that or whether there was another ticket open for this, apologies if there
On 2012-05-14, kcrisman kcris...@gmail.com wrote:
This is now http://trac.sagemath.org/sage_trac/ticket/12947. We've had
some issues with incomplete gamma functions translating properly in the
past, and/or errors in Maxima, but I didn't have time to either look into
that or whether there
On Sunday, May 13, 2012 8:46:41 PM UTC-7, ketchers wrote:
Sage returns negative value for the integral of a positive function
x*cos(x^3) on (0,0.5), if I use abs(cos(x^3))*x, then it gets it correct?
This works for me:
sage: numerical_integral(x*cos(x^3), 0, 0.5)
It may be branch cut strangeness, but if so it is very strange. The
integrand is clearly well-behaved, and the integral,
while in terms of the incomplete gamma function, seems to be off the usual
branch cut (negative real axis).
On Monday, 14 May 2012 15:35:01 UTC+1, Robert Dodier wrote:
On
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