[sage-devel] Re: Characteristic polynomials with bad degrees

2014-04-11 Thread Francis Clarke
Looks like a linbox problem: sage: J = jordan_block(0, 31).change_ring(QQ) sage: (J^2).charpoly(algorithm='generic') x^31 sage: (J^2).charpoly(algorithm='linbox') # the default x^16 -- You received this message because you are subscribed to the Google Groups sage-devel group. To unsubscribe

Re: [sage-devel] Re: ATLAS on Mac

2014-04-11 Thread Jean-Pierre Flori
On Friday, April 11, 2014 1:44:36 AM UTC+2, KnS wrote: Hi Volker, Isn't it possible for the Make file to do something that depends on what the platform is? -KnS Do you actually care about 9MB among the 300+MB o Sage? Sure it may be nice, but does not seem a priority to me... The only

[sage-devel] Re: Installing sage: Error ... -- bash broken due to Sage's outdated libreadline

2014-04-11 Thread leif
leif wrote: On 10.04.2014 04:03, 张彪 wrote: I follow the steps in the Git the Hard Way of http://www.sagemath.org/doc/developer/manual_git.html. but an Error occurs. -- My computer and operating system: 4 Intel(R) Core(TM) i5-3470S CPU @ 2.90GHz

[sage-devel] An xgcd2 algorithm

2014-04-11 Thread François Colas
Hello group, I realised that extended GCD for several integers is not implemented in Sage (i.e. xgcd2([a1, ..., an])) Actually this feature already exists in Magma : ExtendedGreatestCommonDivisor([385, 231, 165, 105]); 1 [ -2, 1, 2, 2 ] It could be interesting to have something like : g, u

Re: [sage-devel] An xgcd2 algorithm

2014-04-11 Thread David Roe
Sounds like a good suggestion. Do you want to create a trac account so that you can create the ticket? David On Fri, Apr 11, 2014 at 9:24 AM, François Colas fco...@gmail.com wrote: Hello group, I realised that extended GCD for several integers is not implemented in Sage (i.e. xgcd2([a1,

Re: [sage-devel] An xgcd2 algorithm

2014-04-11 Thread Kannappan Sampath
On Fri, Apr 11, 2014 at 11:03 PM, David Roe roed.m...@gmail.com wrote: Sounds like a good suggestion. Do you want to create a trac account so that you can create the ticket? David I recall having created trac account for François. -KnS On Fri, Apr 11, 2014 at 9:24 AM, François Colas

Re: [sage-devel] An xgcd2 algorithm

2014-04-11 Thread John Cremona
On 11 April 2014 19:33, Kannappan Sampath kntri...@gmail.com wrote: On Fri, Apr 11, 2014 at 11:03 PM, David Roe roed.m...@gmail.com wrote: Sounds like a good suggestion. Do you want to create a trac account so that you can create the ticket? David I recall having created trac account for

[sage-devel] Another set of satisfied customers

2014-04-11 Thread kcrisman
The other day I was visiting a local biotech company, and when I mentioned to one of their bioinformatics people I worked with Sage, he immediately was very enthusiastic. Turns out that he used to work at NIH, and they use Sage, because... Feel free to communicate to your fellow developers

Re: [sage-devel] An xgcd2 algorithm

2014-04-11 Thread Robert Bradshaw
Note that this is implemented in various places, e.g. https://github.com/sagemath/sagelib/blob/master/sage/ext/multi_modular.pyx , but certainly a general user-friendly function would be nice to have. On Fri, Apr 11, 2014 at 1:18 PM, John Cremona john.crem...@gmail.com wrote: On 11 April 2014

Re: [sage-devel] Homsets with two element classes

2014-04-11 Thread Nicolas M. Thiery
Hi Travis! On Thu, Apr 10, 2014 at 11:49:44AM -0700, Travis Scrimshaw wrote: Suppose I have a homset H from X to Y, and now suppose I have two classes for the morphisms Phi, Psi which I want to choose between depending on the input to H.__call__(). I know the proper (I

[sage-devel] Re: Characteristic polynomials with bad degrees

2014-04-11 Thread Rob Beezer
On Friday, April 11, 2014 12:21:18 AM UTC-7, Francis Clarke wrote: Looks like a linbox problem: Thanks very much, Francis - hadn't thought to check that. I'll see if I can pursue this upstream. It appears we do have the latest version of linbox (1.3.2). Rob -- You received this message