[sage-support] problem with integral (Maxima)
I have encountered a problem in using integral integral(x * sqrt((-2*cos(x))^2 + (2*sin(x))^2), x, 0, pi) correctly gives pi^2 but integral(sin(x) * sqrt((-2*cos(x))^2 + (2*sin(x))^2), x, 0, pi) results in a complaint that Maxima encountered a Lisp error: 2 is not of the type LIST. Why so? Any help? Thanks in advance -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Display all XXXX possibilities? Problem
I'm trying to build a power series, and when I call the function to build it, sage responds Display all possiblities? (y or n). I hit n, then the same command pops up and then computes the power series correctly. Is there some way to get it so I don't have to hit n (i.e. avoid the Display all ... completely) so I can automate this process? Thanks, -John -- | Sage Version 4.2, Release Date: 2009-10-24 | | Type notebook() for the GUI, and license() for information.| -- sage: P = 79 sage: m = 2 sage: upbound= integer_floor(P^m*(P-1)/10)+10 sage: R.q = PowerSeriesRing(IntegerModRing(P^m),upbound) sage: def EEbuild(bound): : EE = 1 - q -q2 +O(q^upbound) : for i in range(2,bound+1): : EE=EE+(-1)^i*(q^((1/2)*i*(3*i+1))+q^((1/2)*i*(3*i-1))) : return EE : sage: lil = integer_floor(sqrt(upbound*4/3)) + 10 sage: sage: ee = EEbuild(lil)+O(q^upbound) Display all 1859 possibilities? (y or n) sage: ee = EEbuild(lil)+O(q^upbound) sage: -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Display all XXXX possibilities? Problem
it should be q^2, i don't know why it didn't copy in right. On Nov 8, 10:52 am, Minh Nguyen nguyenmi...@gmail.com wrote: Hi John, On Tue, Nov 9, 2010 at 2:27 AM, JJBWebb johnjackw...@gmail.com wrote: sage: def EEbuild(bound): : EE = 1 - q -q2 +O(q^upbound) What's the definition for q2? Running your code on Sage 4.6, I got this error: sage: version() 'Sage Version 4.6, Release Date: 2010-10-30' sage: P = 79; m = 2 sage: upbound= integer_floor(P^m * (P-1) / 10) + 10 sage: R.q = PowerSeriesRing(IntegerModRing(P^m), upbound) sage: def EEbuild(bound): : EE = 1 - q - q2 + O(q^upbound) : for i in range(2,bound+1): : EE=EE+(-1)^i*(q^((1/2)*i*(3*i+1))+q^((1/2)*i*(3*i-1))) : return EE : sage: lil = integer_floor(sqrt(upbound*4/3)) + 10 sage: ee = EEbuild(lil)+O(q^upbound) --- NameError Traceback (most recent call last) /home/mvngu/ipython console in module() /home/mvngu/ipython console in EEbuild(bound) NameError: global name 'q2' is not defined -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Display all XXXX possibilities? Problem
Sounds like you have a tab in there somewhere, it typically shouldn't be doing this. On Mon, Nov 8, 2010 at 7:27 AM, JJBWebb johnjackw...@gmail.com wrote: I'm trying to build a power series, and when I call the function to build it, sage responds Display all possiblities? (y or n). I hit n, then the same command pops up and then computes the power series correctly. Is there some way to get it so I don't have to hit n (i.e. avoid the Display all ... completely) so I can automate this process? Thanks, -John -- | Sage Version 4.2, Release Date: 2009-10-24 | | Type notebook() for the GUI, and license() for information. | -- sage: P = 79 sage: m = 2 sage: upbound= integer_floor(P^m*(P-1)/10)+10 sage: R.q = PowerSeriesRing(IntegerModRing(P^m),upbound) sage: def EEbuild(bound): : EE = 1 - q -q2 +O(q^upbound) : for i in range(2,bound+1): : EE=EE+(-1)^i*(q^((1/2)*i*(3*i+1))+q^((1/2)*i*(3*i-1))) : return EE : sage: lil = integer_floor(sqrt(upbound*4/3)) + 10 sage: sage: ee = EEbuild(lil)+O(q^upbound) Display all 1859 possibilities? (y or n) sage: ee = EEbuild(lil)+O(q^upbound) sage: -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] radical ideals check
I want to write code that does the following
Given ideals I,J in CC[x1,...,xn]
check if Radical(I+J)=Radical(I)+Radical(J)
also maybe throw in an example of yes and no just to see it working
Radical(I)={f:there is an m such that f^m is in I} (f is a polynomial
of CC[x1,...,xn]
also Radical(I)=I(V(I)) by Nullstellensatz
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Re: [sage-support] Display all XXXX possibilities? Problem
Hi John, On Tue, Nov 9, 2010 at 2:27 AM, JJBWebb johnjackw...@gmail.com wrote: I'm trying to build a power series, and when I call the function to build it, sage responds Display all possiblities? (y or n). I hit n, then the same command pops up and then computes the power series correctly. It works fine for me with Sage 4.6: sage: version() 'Sage Version 4.6, Release Date: 2010-10-30' sage: P = 79; m = 2 sage: upbound= integer_floor(P^m * (P-1) / 10) + 10 sage: R.q = PowerSeriesRing(IntegerModRing(P^m), upbound) sage: def EEbuild(bound): : EE = 1 - q - q^2 + O(q^upbound) : for i in range(2,bound+1): : EE=EE+(-1)^i*(q^((1/2)*i*(3*i+1))+q^((1/2)*i*(3*i-1))) : return EE : sage: lil = integer_floor(sqrt(upbound*4/3)) + 10 sage: ee = EEbuild(lil)+O(q^upbound) sage: ee = EEbuild(lil)+O(q^upbound) Is there some way to get it so I don't have to hit n (i.e. avoid the Display all ... completely) so I can automate this process? Ensure you don't use tabs. -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: problem with integral (Maxima)
My maxima (5.19.2) also generates an error here. On Nov 8, 8:24 am, pong wypon...@gmail.com wrote: I have encountered a problem in using integral integral(x * sqrt((-2*cos(x))^2 + (2*sin(x))^2), x, 0, pi) correctly gives pi^2 but integral(sin(x) * sqrt((-2*cos(x))^2 + (2*sin(x))^2), x, 0, pi) results in a complaint that Maxima encountered a Lisp error: 2 is not of the type LIST. Why so? Any help? Thanks in advance -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Display all XXXX possibilities? Problem
There was a tab there. . . Thank you for your help. On Nov 8, 1:35 pm, Minh Nguyen nguyenmi...@gmail.com wrote: Hi John, On Tue, Nov 9, 2010 at 2:27 AM, JJBWebb johnjackw...@gmail.com wrote: I'm trying to build a power series, and when I call the function to build it, sage responds Display all possiblities? (y or n). I hit n, then the same command pops up and then computes the power series correctly. It works fine for me with Sage 4.6: sage: version() 'Sage Version 4.6, Release Date: 2010-10-30' sage: P = 79; m = 2 sage: upbound= integer_floor(P^m * (P-1) / 10) + 10 sage: R.q = PowerSeriesRing(IntegerModRing(P^m), upbound) sage: def EEbuild(bound): : EE = 1 - q - q^2 + O(q^upbound) : for i in range(2,bound+1): : EE=EE+(-1)^i*(q^((1/2)*i*(3*i+1))+q^((1/2)*i*(3*i-1))) : return EE : sage: lil = integer_floor(sqrt(upbound*4/3)) + 10 sage: ee = EEbuild(lil)+O(q^upbound) sage: ee = EEbuild(lil)+O(q^upbound) Is there some way to get it so I don't have to hit n (i.e. avoid the Display all ... completely) so I can automate this process? Ensure you don't use tabs. -- Regards Minh Van Nguyen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: 2D plot looks wrong in sage
I just tested the following:
plot(arrow((-0.03,-0.03),(6,6)))
which corrects the problem and makes it seem as if the arrow
actually starts from (0,0).
Is this intended?
On 8 Nov., 23:46, Karsten karste...@gmail.com wrote:
Thanks! This corrects plotting the sine and cosine functions.
But there is no difference when plotting arrows, except the fuzzier
axes you mentioned.
Any ideas about that one?
I really prefer plotting to look as it should with fuzzier axes since
otherwise sage can not be used to present graphs for other people.
On 8 Nov., 19:37, Jason Grout jason-s...@creativetrax.com wrote:
On 11/8/10 5:00 PM, Karsten wrote:
I am a beginner using sage, and I have encountered a problem using the
plot function. Plotting a simple sine or cosine function is not very
precise:
t=var('t')
v=plot(sin(t),-pi,pi
The function is clearly positive in t=-pi, where it should be zero.
The mistake becomes even more clear when setting line thickness to 99:
t=var('t')
v=plot(sin(t),-pi,pi,thickness=99)
In this case when x=0 the line is crossing 1 in the upper side and not
-1 in the lower side.
This problem occurs in all functions i have encountered so far, as if
the function is displayed 1 or 2 pixels off. It's even worse when
plotting arrows:
plot(arrow((0,0), (2,3)))
Here the arrow is clearly not starting in (0,0) as it should.
Is there a solution for this kind of problem?
Yes. It's a tradeoff between sharper graphics and rounding issues with
pixels in plots. IIRC, the basic issue is that horizontal and vertical
lines are snapped to the nearest pixel, so that they aren't
anti-aliased and fuzzy.
This has been investigated quite a bit at:
http://trac.sagemath.org/sage_trac/ticket/7808
In short, you can do:
import matplotlib
matplotlib.rcParams['path.snap'] = False
This will make horizontal and vertical lines (like the axes) not snap to
the nearest pixel. Things may be a bit fuzzier, though.
Thanks,
Jason
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[sage-support] Service Temporarily Unavailable
Hi, I got the following message using Firefox with Sage 4.5.3 via VM 3.1.1 build-282343. Service Temporarily Unavailable The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later. Apache/2.2.12 (Ubuntu) Server at 192.168.231.128 Port 80 Also starting Sage in VM-player (Ubuntu) is strange. It shows only a flash of comments (can't read it) and then the application closes. I'm especially worried that I cannot reach anymore my workbook files Any help is much appreciated! Roland -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
