[sage-support] Re: Why this numerical integral bombs?
On Apr 24, 7:09 pm, mabshoff michael.absh...@mathematik.uni- dortmund.de wrote: So I cannot reproduce this. What platform are you on and are you using a binary, build from source, etc? I'm on an Ubuntu 9.04 ThinkPad T41 laptop. I built my Sage install from 3.4 source myself as there was no binary yet for this latest Ubuntu. cs --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] expression evaluation with dynamically generated variables
Hello, I need to be able to evaluate an expression, where the expression is composed of dynamically generated variables. For example, I might have a list var_list, a list data_list, and an expression exprssn. Here 1) var_list is a list of variables, where every element in var_list was created using sage.calculus.calculus.var 2) data_list is a list of real numbers 3) exprssn is an expression, where every variable comes from var_list How would I evaluate exprssn when the variable var_list[i] takes the value data_list[i]? If I try something like exprssn(var_list[i] = data_list[i]) I get an error. My current solution involves string generation coupled with eval statements and is horribly clunky. What is the right way to do this? Thanks, Eric --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
Michael, And Sage 3.4: | Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for the GUI, and license() for information.| -- sage: numerical_integral(sin(pi*cos(x/2)),0,2)[0] 0.85397903781471396 So I cannot reproduce this. What platform are you on and are you using a binary, build from source, etc? the example that failed has 'exp' instead of 'cos'. However with Sage 3.4 it works for me: -- | Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for the GUI, and license() for information.| -- sage: numerical_integral(sin(pi*exp(x/2)),0,2)[0] -0.43734547482524966 Paul Zimmermann --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: expression evaluation with dynamically generated variables
On Apr 24, 2009, at 11:55 PM, Eric wrote:
Hello,
I need to be able to evaluate an expression, where the expression is
composed of dynamically generated variables. For example, I might have
a list var_list, a list data_list, and an expression exprssn.
Here
1) var_list is a list of variables, where every element in var_list
was created using sage.calculus.calculus.var
2) data_list is a list of real numbers
3) exprssn is an expression, where every variable comes from var_list
How would I evaluate exprssn when the variable var_list[i] takes the
value data_list[i]? If I try something like exprssn(var_list[i] =
data_list[i]) I get an error.
My current solution involves string generation coupled with eval
statements and is horribly clunky. What is the right way to do this?
How about this:
sage: var_list = var('x,y,z')
sage: data_list = [2,3,5]
sage: f = x^3 - y*z
sage: f.subs(dict(zip(var_list, data_list)))
-7
The zip command takes two lists, and zips them together. The dict
can take a list of 2-tuples as a constructor.
sage: zip(var_list, data_list)
[(x, 2), (y, 3), (z, 5)]
sage: dict(zip(var_list, data_list))
{y: 3, x: 2, z: 5}
- Robert
--~--~-~--~~~---~--~~
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
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 12:23 am, Paul Zimmermann paul.zimmerm...@loria.fr wrote: Michael, Hi Paul, And Sage 3.4: | Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for the GUI, and license() for information. | -- sage: numerical_integral(sin(pi*cos(x/2)),0,2)[0] 0.85397903781471396 So I cannot reproduce this. What platform are you on and are you using a binary, build from source, etc? the example that failed has 'exp' instead of 'cos'. However with Sage 3.4 it works for me: -- | Sage Version 3.4, Release Date: 2009-03-11 | | Type notebook() for the GUI, and license() for information. | -- sage: numerical_integral(sin(pi*exp(x/2)),0,2)[0] -0.43734547482524966 Paul Zimmermann I ran this on 3.4, 3.4.1 and a couple other rc releases in between: sage: for i in (0..200): : numerical_integral(sin(pi*exp(x/2)),0,2)[0] : and I could not get a failure. Note that the most likely culprit here is clisp IMHO. Just today I found out that clisp 2.47 doesn't build on the latest Mandriva release in 32 and 64 bit flavors. Oh well ... We should have an Ubuntu 9.04 test image in the not too distant future, so maybe we will hit it there. Cheers, Michael --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Dirichlet L-function
Is there a way to compute Dirichlet L-functions http://en.wikipedia.org/wiki/Dirichlet_L-function ? I tried lcalc.twist_values() but it doesn't work. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Dirichlet L-function
After you type lcalc.twist_values? and look at the examples given, can you tell which command does not work, what operating machine you are using and version of sage you are running? On Sat, Apr 25, 2009 at 9:20 AM, agi agnes.j...@googlemail.com wrote: Is there a way to compute Dirichlet L-functions http://en.wikipedia.org/wiki/Dirichlet_L-function ? I tried lcalc.twist_values() but it doesn't work. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Dirichlet L-function
The example from the reference manual p.2630 sage: lcalc.twist_values(0.5, -10, 10) [(-8, 1.10042141), (-7, 1.14658567), (-4, 0.667691457), (-3, 0.480867558), (5, 0.231750947), (8, 0.373691713)] works fine. But I need the value of L( chi_3 , 2 ). I'm using Sage Version 3.4 and the machine is an AMD X2 4200 and 2GB RAM. On 25 Apr., 15:38, David Joyner wdjoy...@gmail.com wrote: After you type lcalc.twist_values? and look at the examples given, can you tell which command does not work, what operating machine you are using and version of sage you are running? On Sat, Apr 25, 2009 at 9:20 AM, agi agnes.j...@googlemail.com wrote: Is there a way to compute Dirichlet L-functions http://en.wikipedia.org/wiki/Dirichlet_L-function? I tried lcalc.twist_values() but it doesn't work. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Minor sage 3.4/jsMath3.6b rendering issue in IE7
Thanks for posting the new example. I have found that the problem is
due to the fact that Sage puts the output inside a PRE block, and
IE7 gets confused about some of its measurements in that case. It can
be fixed by including
span.typeset {
white-space: normal;
}
in the css/main.css file for sage. I will add this to jsMath in the
next release.
Davide
--~--~-~--~~~---~--~~
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
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] DSage on Amazon EC2
Hi, I just wonder - does anyone have experience on running DSage on Amazon EC2 (on preferably more than one instance) or similar Cloud-Computing service? I'm preparing to try out the platform but because of it's non- zero cost I'd prefer not go in blind, would be very happy if someone who did it already could share some or any informations about how it runs there, with what optimizations, etc regards, Andrzej. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: expression evaluation with dynamically generated variables
Thanks, I think that answered my question!
On Apr 25, 12:35 am, Robert Bradshaw rober...@math.washington.edu
wrote:
On Apr 24, 2009, at 11:55 PM, Eric wrote:
Hello,
I need to be able to evaluate an expression, where the expression is
composed of dynamically generated variables. For example, I might have
a list var_list, a list data_list, and an expression exprssn.
Here
1) var_list is a list of variables, where every element in var_list
was created using sage.calculus.calculus.var
2) data_list is a list of real numbers
3) exprssn is an expression, where every variable comes from var_list
How would I evaluate exprssn when the variable var_list[i] takes the
value data_list[i]? If I try something like exprssn(var_list[i] =
data_list[i]) I get an error.
My current solution involves string generation coupled with eval
statements and is horribly clunky. What is the right way to do this?
How about this:
sage: var_list = var('x,y,z')
sage: data_list = [2,3,5]
sage: f = x^3 - y*z
sage: f.subs(dict(zip(var_list, data_list)))
-7
The zip command takes two lists, and zips them together. The dict
can take a list of 2-tuples as a constructor.
sage: zip(var_list, data_list)
[(x, 2), (y, 3), (z, 5)]
sage: dict(zip(var_list, data_list))
{y: 3, x: 2, z: 5}
- Robert
--~--~-~--~~~---~--~~
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
URLs: http://www.sagemath.org
-~--~~~~--~~--~--~---
[sage-support] Re: snapshot saving
I have made a patch that attempts to limit the number of snapshots that get saved (per worksheet) to an absolute maximum of 30. There's a bit of a dilemma about just how to do this, given that at present some users will have more than 30 snapshots for some worksheets, and in the future this limit might be configurable. More details at http://trac.sagemath.org/sage_trac/ticket/5895 - comments invited. At http://trac.sagemath.org/sage_trac/ticket/5880 Gonzalo Tornaria has said that since 3.4.1 snapshots that are duplicates are no longer being created, which I can confirm with limited testing. He has posted there a bash script that will clean out duplicate snapshots created by previous versions, should you want to do some more surgical house-cleaning. --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 2:10 am, mabshoff michael.absh...@mathematik.uni- dortmund.de wrote: I ran this on 3.4, 3.4.1 and a couple other rc releases in between: sage: for i in (0..200): : numerical_integral(sin(pi*exp(x/2)),0,2)[0] : and I could not get a failure. Hmm. That is weird. I just compiled 3.4.1 from source and got the same error on the newer version too. We should have an Ubuntu 9.04 test image in the not too distant future, so maybe we will hit it there. That seems to be the only delta between you guys and me so chances are that's the problem. cs --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 2:17 pm, Chris Seberino cseber...@gmail.com wrote: Hi Chris, On Apr 25, 2:10 am, mabshoff michael.absh...@mathematik.uni- SNIP Hmm. That is weird. I just compiled 3.4.1 from source and got the same error on the newer version too. Ok. SNIP That seems to be the only delta between you guys and me so chances are that's the problem. Not really, we switched from clisp 2.46 to 2.47 and if you look at https://groups.google.com/group/sage-devel/t/753a8d2f3c052183 for some people who have had issues for a long, long time we could never get to the bottom of all the sudden they completely disappear. Clisp seems to be working or not working depending on compiler release, target CPU, etc, so I am not surprised you are seeing oddities no one can reproduce. We are in progress of switching to ecl as the basis for Maxima which will hopefully serve as a more stable basis than clisp. Given that we want 3.4.2 out early next week the ecl switch will probably miss the boat on that one, but since it is essential to switch for Sage 4.0 to get Solaris support working it will be in 4.0. cs Cheers, Michael --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Dirichlet L-function
Hi, The example from the reference manual p.2630 sage: lcalc.twist_values(0.5, -10, 10) [(-8, 1.10042141), (-7, 1.14658567), (-4, 0.667691457), (-3, 0.480867558), (5, 0.231750947), (8, 0.373691713)] works fine. But I need the value of L( chi_3 , 2 ). I think the problem is just one of documentation. In fact, the twist_values command calls into lcalc, and it's giving you twists by quadratic characters with *conductor* between dmin and dmax, *not* the characters of the form (d/.) with d between dmin and dmax. As it happens, the Kronecker symbol (3/.) happens to have conductor 12, not 3, which is what's causing the confusion: sage: kronecker_character(3).conductor() 12 Then this should be the value you want: sage: lcalc.twist_values(2,12,12) [(12, 0.949703126)] I'll file a trac ticket about this right now ... and a patch is up: http://trac.sagemath.org/sage_trac/ticket/5896 Anyone want to give this a quick review? -cc --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: request for SAGE DVD
2009/4/25 Bartosz Naskręcki nasq...@gmail.com: Dear Sir, I am writing to you as a student of Adam Mickiewicz University, Poznan, Poland since we have in May 25- 29 a huge proscience event. On the Department of Mathematics and Computer Science we want to promote the computational techniques. The prestentations are focused on high school students and their tutors so we thought that SAGE will be the best target for them since it's a free package. I am personally a user of the package and extensivly use it with high ranks elliptic curves of my own. If you could help us with obtaining some gadgets and free SAGE copies for the event I will be greatly obliged. I don't personally provide or make Sage DVD's or other gadgets. You might try asking on sage-support, where I've cc'd this response: http://groups.google.com/group/sage-support With respect, Bartosz Naskręcki student, IV year, mathematics Department of Mathematics and Computer Science Adam Mickiewicz University, Poznan, Poland -- William Stein Associate Professor of Mathematics University of Washington http://wstein.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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 5:36 pm, mabshoff michael.absh...@mathematik.uni- dortmund.de wrote: Not really, we switched from clisp 2.46 to 2.47 and if you look at https://groups.google.com/group/sage-devel/t/753a8d2f3c052183 for some people who have had issues for a long, long time we could never get to the bottom of all the sudden they completely disappear. What should I do until Sage 4.0? Is there a way to tweak my 3.4.1 to use clisp 2.47? cs --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 6:38 pm, Chris Seberino cseber...@gmail.com wrote: On Apr 25, 5:36 pm, mabshoff michael.absh...@mathematik.uni- Hi Chris, dortmund.de wrote: Not really, we switched from clisp 2.46 to 2.47 and if you look at https://groups.google.com/group/sage-devel/t/753a8d2f3c052183 for some people who have had issues for a long, long time we could never get to the bottom of all the sudden they completely disappear. What should I do until Sage 4.0? Is there a way to tweak my 3.4.1 to use clisp 2.47? Do you mean clisp 2.46 since 3.4.1 ships with clisp 2.47 while Sage 3.4 used clisp 2.46? You can force the use of clisp-2.46.spkg by running ./sage -f /patch/ to/clisp-2.46.spkg, but that will break the pure clisp mode AFAIK. It will also not use the readline-off mode we hacked into clisp 2.47, but if you never saw any Maxima hangs it should not matter to you too. You must also force a rebuild of the Maxima.spkg (via ./sage -f ../maxima- x.y.z.spkg after rebuilding clisp to make it use that version of clisp you just build without trouble). Note that the above change will likely be overwritten by updated Maxima and ecl.spkgs in Sage 4.0, but not 3.4.2. Maxima itself has a disable-readline option, but it seems broken with Maxima 5.16.3+clisp-2.[46|47], I don't know what the status of 5.18.1 which was just released is. cs Cheers, Michael --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: request for SAGE DVD
On Apr 25, 2009, at 5:51 PM, William Stein wrote: 2009/4/25 Bartosz Naskręcki nasq...@gmail.com: Dear Sir, I am writing to you as a student of Adam Mickiewicz University, Poznan, Poland since we have in May 25- 29 a huge proscience event. On the Department of Mathematics and Computer Science we want to promote the computational techniques. The prestentations are focused on high school students and their tutors so we thought that SAGE will be the best target for them since it's a free package. I am personally a user of the package and extensivly use it with high ranks elliptic curves of my own. If you could help us with obtaining some gadgets and free SAGE copies for the event I will be greatly obliged. I don't personally provide or make Sage DVD's or other gadgets. You might try asking on sage-support, where I've cc'd this response: Feel free to download an iso and burn as many DVDs as you want (I can point you to one if you want, as soon as the binaries for the latest release are out). - Robert --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why this numerical integral bombs?
On Apr 25, 7:02 pm, mabshoff michael.absh...@mathematik.uni- dortmund.de wrote: What should I do until Sage 4.0? Is there a way to tweak my 3.4.1 to use clisp 2.47? Do you mean clisp 2.46 since 3.4.1 ships with clisp 2.47 while Sage 3.4 used clisp 2.46? Since *I* was able to reproduce the problem on 3.4 on Ubuntu Jaunty haven't I ruled out that clisp 2.47 is not the problem? Is there something else I can try? cs --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
