[sage-support] Re: Create a cycloid animation of a lawnmower blades path

2011-05-07 Thread Damien
Hi David, Thanks for the link, I am thinking this is a bit out of my league and would like anyone to have a go at coding / programming sage to generate the path the blades would take. Cheers Damien -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this gr

[sage-support] Implicit_plot3d and coordinate transforms

2011-05-07 Thread ObsessiveMathsFreak
I was wondering whether it was possible to use coordinate transforms in implicit_plot3d in the same was as for plot3d? For example, the following produces a sphere sage: u, v, w = var('u v w') sage: spherical=(w*cos(u)*sin(v),w*sin(u)*sin(v),w*cos(v)) sage: plot3d(2,(u,-pi,pi),(v,0,pi),transforma

[sage-support] Re: Plotting Functions of 3 variables

2011-05-07 Thread Jason Grout
On 5/7/11 5:00 PM, ObsessiveMathsFreak wrote: I still can't get this code to work. In lieu of any external solutions, I've tried to hack something together in sage itself, using the standard 3d functionality. Basically it involves drawing a series of implicit plot 3d countours, then cutting into

[sage-support] Re: Plotting Functions of 3 variables

2011-05-07 Thread ObsessiveMathsFreak
I still can't get this code to work. In lieu of any external solutions, I've tried to hack something together in sage itself, using the standard 3d functionality. Basically it involves drawing a series of implicit plot 3d countours, then cutting into them with a small plane and drawing a 2d counto

[sage-support] Notebook data & cache

2011-05-07 Thread Eugene Goldberg
Hello! I am using Sage with Notebooks for some time, and my .sage directory now is 129 Mb. I believe it is impossible for me to write so much code (text), that means most of this space comes from notebook cache (images, for example). Is there some easy way to remove cache? Best regards. -- To p

Re: [sage-support] removing redundant equality expression

2011-05-07 Thread tvn
Hi, actually I do use Qepcad and other smt solvers like Z3/ CVC3 etc for non-linear inequalities and linear inequalities. Basically I use them to see if the conjunction of e1,...,e_n imply e_n+1 , if it does then I can remove e_n+1. However this is also not the right approach for finding

[sage-support] Re: Shift-enter doesn't work (and 'evaluate' doesn't show up)

2011-05-07 Thread Jason Grout
On 5/6/11 9:03 PM, Harmor wrote: Hello Friends, thanks in advance for your help. I just installed sage on my ubuntu desktop after dealing with sort of a problem with the number of inodes in my file system. It turns out that after starting the sage notebook the shift-enter evaluation method doesn

Re: [sage-support] removing redundant equality expression

2011-05-07 Thread Burcin Erocal
On Fri, 6 May 2011 15:22:25 -0700 (PDT) tvn wrote: > given a list of equality expressions, is there a way to remove all the > members that can be inferred by others in the list so that the final > list contains only independent expressions and they imply all the ones > that were removed. > > For