[sage-support] Re: linear first order recurrence system

2012-03-13 Thread Kakaz
vid Joyner wrote: > On Tue, Mar 13, 2012 at 10:27 AM, Kakaz wrote: > > Thanks for answer. > > > Yes, I did. I found similar question but it was about rsolve and > > second order relation. > > I am looking for rsolve or similar solver in context of several > > var

[sage-support] Re: linear first order recurrence system

2012-03-13 Thread Kakaz
d Joyner wrote: > I think it is in sympy (included in Sage). > > I vaguely remember the question has been asked before on > this list but I don't remember the exact answer. Did you look through the > sage-support archive? > > > > > > > > On Tue, Mar

[sage-support] Re: linear first order recurrence system

2012-03-13 Thread Kakaz
Of course it should be: a(n+1) = A*a(n) + B*b(n) b(n+1) = C*a(n) + D*b(n) On Mar 13, 2:32 pm, Kakaz wrote: > Hi all! > I would like to ask - is there possibility in Sage ( or Maxima) to > solve first order recurrence relation given by linear system with > several variables? > For

[sage-support] linear first order recurrence system

2012-03-13 Thread Kakaz
Hi all! I would like to ask - is there possibility in Sage ( or Maxima) to solve first order recurrence relation given by linear system with several variables? For example: a(n+1) = A*a(n) + B*b(n) b(n) = C*a(n) + D*b(n) Have I find solution of linear system at first an then solve "separated" rel

[sage-support] Re: Potential Security Hole -- sh (shell) in Notebook

2010-04-02 Thread Kakaz
On 2 Kwi, 03:23, Robert Bradshaw wrote: > On Apr 1, 2010, at 6:04 PM, TianWei wrote: > > > The "sh" option in the sage notebook allows anyone to access the > > command-line shell on the sage server. This grants users access to any > > directory on the server, including configuration settings, et

[sage-support] Re: GR package

2010-02-04 Thread Kakaz
On 5 Lut, 03:16, Minh Nguyen wrote: > Hi, > > I think this email properly belongs to sage-support. > > On Fri, Feb 5, 2010 at 1:13 PM, Dox wrote: > > Hi people! > > As some of you may know I'm a physicist. One of my complains to > > Mathematica is the lack of an easily usable tensor package, sp

[sage-support] Re: Singular-nc_algebra-question

2010-02-03 Thread Kakaz
Ok, I found the proper way to do it, maybe someone would be interested in, so I paste here some code. On 3 Lut, 13:08, Kakaz wrote: > Here is Sage code I try to use: > singular.LIB('ncall.lib') > R=singular.ring(0,'(x,y,z,a,b)','dp') > > This are comm

[sage-support] Re: Singular-nc_algebra-question

2010-02-03 Thread Kakaz
Maybe I shoud provide more detailed question. I try to make some calculus in Sage with noncommutative variables. I know how to do it in singular, as You may see in example from http://www.sagenb.org/home/pub/1474/ It works ok, but I have problem with switching into sage environment back. Of course

[sage-support] Singular-nc_algebra-question

2010-02-01 Thread Kakaz
I try to define some noncommutative structures in Sage, but I do not know exactly how. I found this thread: http://groups.google.com/group/sage-support/browse_thread/thread/73ea537d657a3654/ebdc76a97a0b1ea6?lnk=gst&q=noncommutative#ebdc76a97a0b1ea6 and I check examples, but unfortunately I do not k

[sage-support] Re: feature request - worksheets labels.

2010-02-01 Thread Kakaz
On 1 Lut, 00:34, William Stein wrote: > 2010/1/31 Kakaz : > > > I have several worksheets in my sage, and when I have some new ideas I > > create other one, somethimes just for fun. So there are worksheets > > named: "Idea 1", "Matrices", 'FFT&

[sage-support] feature request - worksheets labels.

2010-01-31 Thread Kakaz
I have several worksheets in my sage, and when I have some new ideas I create other one, somethimes just for fun. So there are worksheets named: "Idea 1", "Matrices", 'FFT", "FFT3" etc. After a month I do not remember what is inside. Of course I may open them and check, but I thing that there shoul

[sage-support] Re: Problem with binary version download

2010-01-22 Thread Kakaz
On 22 Sty, 12:43, Minh Nguyen wrote: > Hi Kazek, > > On Fri, Jan 22, 2010 at 10:38 PM, Kakaz wrote: > > > > > It ss too early to gather binaries for 4.3.1? > > Yes, it's too early to download binaries. You can check the status of > the mirrors at &g

[sage-support] Problem with binary version download

2010-01-22 Thread Kakaz
Hi! I have problems with binary version download. I try to get Ubuntu version but DownThemAll complains that file is corrupted and in fact it do not download any single bit of Sage distribution - it wait until timeout. It ss too early to gather binaries for 4.3.1? Best Regards Kazek -- To post t

[sage-support] Re: Three index number table

2010-01-16 Thread Kakaz
On 16 Sty, 12:35, Minh Nguyen wrote: > Hi, Thanks a lot! Kazek -- 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/sag