1. anyone who believes that sqrt(x^2) is |x| is mistaken. As Bill Page
says, there are two values.
2. any system that automatically produces |x| can be tricked into
committing serious errors.
Currently, Maxima apparently does this. Some people consider this a
feature. Clearly we
have a
>
> >
> > Apparently sympy can't do it either (?). Here is my experiment.
> >
>
> Sorry, I don't see how your code below is testing Sympy.
>
>
It wasn't, that was just an off-hand remark. The testing was for the
actual problem.
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Earlier in the docbuilding, I see this:
[combinat ] building [inventory]: targets for 2 source files that are out
of date
[combinat ] updating environment: 0 added, 2 changed, 0 removed
[combinat ] reading sources... [ 50%]
sage/combinat/cluster_algebra_quiver/cluster_seed
[combinat ] Encoding e
This I did already...
2015-06-03 18:21 GMT-05:00 Volker Braun :
> Try "make doc-clean && make"
>
>
> On Thursday, June 4, 2015 at 1:06:03 AM UTC+2, Viviane Pons wrote:
>>
>> Hi everyone,
>>
>> I get this doc build error on a branch (
>> http://trac.sagemath.org/ticket/18594) and I have no idea wh
Try "make doc-clean && make"
On Thursday, June 4, 2015 at 1:06:03 AM UTC+2, Viviane Pons wrote:
>
> Hi everyone,
>
> I get this doc build error on a branch (
> http://trac.sagemath.org/ticket/18594) and I have no idea why. I just
> know the error comes from the branch (I can build the doc fine on
Hi everyone,
I get this doc build error on a branch (
http://trac.sagemath.org/ticket/18594) and I have no idea why. I just know
the error comes from the branch (I can build the doc fine on develop) but I
don't know which commit caused it. I'm going to look into it but if someone
has the slightest
Sitting in the wrong Google Group. ;-) Sorry for the noise.
Off course, any Sage developer who would like to go bicycle riding with us
is always welcome!
Rob
On Wednesday, June 3, 2015 at 2:47:10 PM UTC-7, Rob Beezer wrote:
>
> Need leadership - feel free to volunteer on/off-list for Tuesday
Need leadership - feel free to volunteer on/off-list for Tuesday or
Thursday. I can help with route and post-ride suggestions, and rebroadcast.
Summer ride calendar is beginning to take form:
Jun 9 Leadership?
Jun 16
Jun 23 Solstice Ride, Port Orchard
Aug 18 Gretchen and Hal Hodgins, Rosed
On Wed, Jun 3, 2015 at 2:24 PM, Johan S. R. Nielsen
wrote:
> What is the sensible notion of parent() for a vector that I drew out of a
> vector subspace?
> For instance, what should be printed by the following lines?
>
> VS = (QQ^3).subspace([ (1, 1 ,1) ])
> v = VS.an_element()
> print v.parent()
What is the sensible notion of parent() for a vector that I drew out of a
vector subspace?
For instance, what should be printed by the following lines?
VS = (QQ^3).subspace([ (1, 1 ,1) ])
v = VS.an_element()
print v.parent()
One possibility is that QQ^3 should be printed. Alternatively, and the
Awesome news. Congratulations on the project!
On Tuesday, June 2, 2015 at 12:30:47 AM UTC+2, William wrote:
>
>
> This is a preliminary announcement for a full time Sage developer
>> position
>
>
> ... the first such position ever! :-)
>
>
> No... The coding theory in Sage project has been runn
On 2 June 2015 at 13:26, Gregory Bard wrote:
>
> Consider the integral of sqrt( cot(x)^2 ). I think we can all agree that
>
> sqrt( cot(x)^2 ) = abs( cot (x) ) =/= cot(x)
>
> ...
That is probably exactly where the disagreement starts since sqrt can
be considered a "multi-valued function" and one
Yes.
https://cloud.sagemath.com/projects/b04b5777-e269-4c8f-a4b8-b21dbe1c93c6/files/integral.sagews
On 3 June 2015 at 13:31, Samuel Lelievre wrote:
> Can fricas do this integral?
>
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Can fricas do this integral?
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Hi
There is a new working deb on the Sage PPA (sage 6.6, our version
6.7ppa10revert6.6.aims6-2).
We also have a separate sage-dev repository:
https://launchpad.net/~aims/+archive/ubuntu/sagemath-dev
If you enable both PPAs sagemath and sagemath-dev, you will get the new
versions faster, and stil
On Wed, Jun 3, 2015 at 9:40 AM, kcrisman wrote:
>>
>> Something is happening in the interface, yes, but
>>
>
> Apparently sympy can't do it either (?). Here is my experiment.
>
Sorry, I don't see how your code below is testing Sympy.
I got a wrong answer (namely, -sqrt(2), when I think a correc
>
>
> So this is indeed a Maxima bug, I guess.
> http://trac.sagemath.org/ticket/18599
>
>
Reported upstream at https://sourceforge.net/p/maxima/bugs/2971/
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>
>
> Something is happening in the interface, yes, but
>
>
Apparently sympy can't do it either (?). Here is my experiment.
sage: from sage.symbolic.integration.external import maxima_integrator
sage: maxima_integrator(sqrt(cot(x)^2),x)
-1/2*log(tan(x)^2 + 1) + log(tan(x))
sage: maxima_integrat
Just to advertise this sage-support thread
https://groups.google.com/d/topic/sage-support/U0z03oPRM_g/discussion
here on sage-devel and sage-release.
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