I asked
What is fastest way in Sage to compute biggest eigenvalue of a symmetric
matrix whose elements are positive integers?
and got answer to use
M=scipy.matrix(...)
scipy.linalg.eigh(M, eigvals=..., eigvals_only=True)
However, now I should compute smallest eigenvalues with bigger precisio
The pdf files on http://www.sagemath.org/help.html#SageStandardDoc aren't
accessible, due to wrong permissions.
(Forbidden. You don't have permission to access ...)
-- Peter Mueller
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I am trying to compose 3 affine automorphisms of the Markoff surface.
The following code produces an error:
A. = AffineSpace(QQ,3)
M = A.subscheme([x^2+y^2+z^2-3*x*y*z])
H = Hom(M,M)
f1 = H([3*y*z-x,y,z])
f2 = H([x,3*x*z-y,z])
f3 = H([x,y,3*x*y-z])
f3*f2*f1
What am I doing wrong?
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On 18 November 2014 13:38, Soli vishkautsan wrote:
> I am trying to compose 3 affine automorphisms of the Markoff surface.
> The following code produces an error:
>
> A. = AffineSpace(QQ,3)
> M = A.subscheme([x^2+y^2+z^2-3*x*y*z])
> H = Hom(M,M)
> f1 = H([3*y*z-x,y,z])
> f2 = H([x,3*x*z-y,z])
> f3
Thanks,
another workaround is to use
(f2*f1).post_compose(f3)
which also works.
The same problem when composing the homogenization of these morphisms.
I will add this to trac, unless someone else intervenes :)
On Tuesday, November 18, 2014 2:47:33 PM UTC+1, John Cremona wrote:
>
> On 18 November
Thank you so much.
On 18 November 2014 00:02, slelievre wrote:
> Santanu wrote:
>
>
>> R.=BooleanPolynomialRing(3)
>> f=v1*v2+v1*v3+v1
>> print f.coefficient(v1)
>>
>> I am getting
>>
>> Traceback (click to the left of this block for traceback)
>> ...
>> AttributeError: 'sage.rings.polynomial.pb
I tried installing sage 6.4 from several binaries but everytime I started a
new sage and type in some calculations, the above warning message appears.
If I re-type the exact calculations again, such warnings disappear.
Further, it seems that these warnings are related to certain calculations,
b
I tried installing sage 6.4 from several binaries but everytime I started a
> new sage and type in some calculations, the above warning message appears.
> If I re-type the exact calculations again, such warnings disappear.
> Further, it seems that these warnings are related to certain calcula
>
> Problem solved. I did not install 'Command Line Tools for Xcode'
> previously on my Mac because I did not read instructions on installing Sage
> from source code. After installing Command Line Tools, it works now. Though
> the installation of Sage is still from a binary one.
>
Yes, this w
Emmanuel
Any way to make Sage act like it can't find the solution (emit question
back to user) INSTEAD of emitting the empty set?
"I can't find the solution" and "There is no solution" are NOT the same
thing?
> cs
>>
>
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Yes, I had Command Line Tools installed, and the Xcode version is 6.1.
After I stop getting that error from my previous post
(https://groups.google.com/forum/#!topic/sage-support/wj4ObDhv_xE), I get
these new warnings. I know very little about Xcode or CLT so I'm quite
confused. I can get corre
I just downloaded version 6.4, specifically:
sage-6.4-x86_64-Darwin-OSX_10.9_x86_64-app.dmg
This package does not contain an app file like previous versions.
Is this correct?
john hanly
Go Nats
natsfan...@gmail.com
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Hmm yes, the app and non-app dmg are identical for some reason
On Tuesday, November 18, 2014 6:43:30 PM UTC, john wrote:
>
> I just downloaded version 6.4, specifically:
>
> sage-6.4-x86_64-Darwin-OSX_10.9_x86_64-app.dmg
>
> This package does not contain an app file like previous versions.
> Is th
> Hmm yes, the app and non-app dmg are identical for some reason
>
>>
>>
Possibly because SAGE_APP_BUNDLE=yes was not set? Or did it attempt but
fail (but then the failure did not break the bdist process - which would be
worrisome!)?
Luckily this should be easier to fix than some other bugs!
No, the buildbot sets SAGE_APP_BUNDLE. Possibly a 10.10 SDK issue?
On Tuesday, November 18, 2014 9:00:58 PM UTC, kcrisman wrote:
>
>
> Hmm yes, the app and non-app dmg are identical for some reason
>>
>>>
>>>
> Possibly because SAGE_APP_BUNDLE=yes was not set? Or did it attempt but
> fail (but t
Does anybody know how to do this sort of thing in Sage? Asked by me
today by a Stanford CS professor...
"It would be nice if it knew how to simplify the tail probability of a
binomial distribution. Mathematica can do:
FullSimplify[ Sum[Binomial[total, k] x^k (1 - x)^(total - k), {k, 0, n}]]
-> (
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