On 12/03/2012 09:44 AM, Cary Cherng wrote:
I tried using solve_ineq in the notebook in the simple way below and got
an error. It seems to be related to
http://trac.sagemath.org/sage_trac/ticket/11520
Is there a workaround?
R.g1,g2 = PolynomialRing(QQ)
solve_ineq([g1 g2],[g1,g2])
Traceback
The patch in the ticket seemed to only address making the error messages
better. Is there some mechanism to convert p1 and p2 to symbolic based
polynomials in the below code
R.g1,g2 = PolynomialRing(QQ)
...
# long sequence of calculations to compute polynomials p1 and p2
...
solve_ineq([p1 0,
I don't know of any nice way of converting the variables to symbolic
variables.
Even if you did compute the polynomials p1 and p2, and even if you did
manage to put it in the solve_* expressions after converting the
variables, the answer that you will get as the solution will not belong
to
On Monday, December 3, 2012 6:19:18 AM UTC-5, P Purkayastha wrote:
I don't know of any nice way of converting the variables to symbolic
variables.
For the record, you can just cast to SR (the symbolic ring):
sage: R.g1,g2 = PolynomialRing(QQ)
sage: g1 = SR(g1)
sage: g2 = SR(g2)
sage:
On 12/03/2012 07:42 PM, Volker Braun wrote:
On Monday, December 3, 2012 6:19:18 AM UTC-5, P Purkayastha wrote:
I don't know of any nice way of converting the variables to symbolic
variables.
For the record, you can just cast to SR (the symbolic ring):
sage: R.g1,g2 =
sage: k4=graphs.CompleteGraph(4)
sage: k4.complement().line_graph().complement()
complement(): Graph on 0 vertices
clique_number() is crashing on the empty graph,
On Saturday, December 1, 2012 9:30:27 AM UTC-5, Georgi Guninski wrote:
for g in graphs(4):
On 12/1/12 8:30 AM, Georgi Guninski wrote:
On sagenb.org don't get any output, don't know how to interpret this.
That happens a lot of times when there was a crash, so it's consistent
with the error you saw.
Thanks,
Jason
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http://trac.sagemath.org/sage_trac/ticket/10756
T_T
Of course I only did it for clique_maximum() T_T
Well, Georgi... Weren't you looking for an easy patch to write ? :-P
Nathann
On Monday, December 3, 2012 3:16:09 PM UTC+1, Jason Grout wrote:
On 12/1/12 8:30 AM, Georgi Guninski wrote:
On
Try mat.kernel_on(V).
Also, if v is a vector in the ambient space which happens to lie in V then
V.coordinates(v) will give its coordinates w.r.t. the basis of V.
John Cremona
On Monday, December 3, 2012 1:38:38 AM UTC, Andrew Mathas wrote:
Hi All,
I have been playing with some code
Hello
Sage VM runs Chrome in kiosk mode, and refuses to get out of kiosk mode (I
can press F11 to my heart's content; it doesn't change anything), therefore
won't allow any changes to its settings. The settings certainly need to
change for non-trivial work, as when I'd like to save a worksheet
Really I see the browser running inside the VM as a crutch for those that
can't use their host browser because of a misconfigured firewall.
I understand your frustration being stuck with kiosk mode, but I don't
think that making the environment in the VM more complex is a good idea
either.
On Monday, December 3, 2012 1:24:38 PM UTC-6, Volker Braun wrote:
Really I see the browser running inside the VM as a crutch for those that
can't use their host browser because of a misconfigured firewall.
Pshaw. For some reason I was under the impression that this wasn't working
anymore.
In the below why does solve_ineq called with the inequalities t1 = t2 , t1
t2 not return [ ], but the other invocations of solve_ineq return the
empty set as [ ] ?
sage: g1,g2 = var('g1,g2')
sage: t1 = g1^2*g2^2
sage: t2 = g1^2*g2
sage: solve_ineq([t1 = t2 , t1 t2],[g1,g2])
[[g1 == 0, 1 g2,
Hi John,
Thanks for the reply, but you have my problem upside down as I don't need
to restrict from the ambient space to the subspace but rather to extend
from the subspace to the ambient space.
For example, I could have:
sage: V
Free module of degree 4 and rank 3 over Integer Ring
User
On Monday, December 3, 2012 5:09:40 PM UTC-8, Andrew Mathas wrote:
Hi John,
Thanks for the reply, but you have my problem upside down as I don't
need to restrict from the ambient space to the subspace but rather to
extend from the subspace to the ambient space.
For example, I could
On 12/04/2012 08:51 AM, Cary Cherng wrote:
In the below why does solve_ineq called with the inequalities t1 = t2 ,
t1 t2 not return [ ], but the other invocations of solve_ineq return
the empty set as [ ] ?
sage: g1,g2 = var('g1,g2')
sage: t1 = g1^2*g2^2
sage: t2 = g1^2*g2
sage: solve_ineq([t1
I recognize that it is the empty set described in a different way. Is there
a reason why it can't always describe the empty set as [ ] ?
The question I am having is how do I tell if it is the empty set for more
complicated inputs? For example, consider setting t1 and t2 to large
polynomials
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