[sage-devel] Re: Advanced topics in linear algebra algorithmic class

2008-09-26 Thread Clement Pernet
Hi, Thanks for your suggestion: unfortunately, Dailymotion limits both the file size to 150M and the lenght to 15mins or so. So it will not work for the class. I'm uploading today's second lecture. A link will be available on the course page when ready: http://www.math.washington.edu/~pernet/Mat

[sage-devel] Re: C/C++ Library Versioning in Sage

2008-09-26 Thread mabshoff
On Sep 26, 12:28 pm, Martin Albrecht <[EMAIL PROTECTED]> wrote: > > > - "Sage in general does not benefit from versioned libraries" > > > > Is adding a proper soname / library versioning to a library what you call > > > versioned libraries? Isn't that somehow standardised and good practice? > >

[sage-devel] Re: C/C++ Library Versioning in Sage

2008-09-26 Thread Martin Albrecht
> > - "Sage in general does not benefit from versioned libraries" > > > > Is adding a proper soname / library versioning to a library what you call > > versioned libraries? Isn't that somehow standardised and good practice? > > Sure, on Linux and some Unix platforms. But doing it right, i.e. for >

[sage-devel] Re: Advanced topics in linear algebra algorithmic class

2008-09-26 Thread Timothy Clemans
Hi Clément, The free web site http://www.dailymotion.com/us offers much better video quality than Google Video. On Thu, Sep 25, 2008 at 8:12 PM, Clement Pernet <[EMAIL PROTECTED]> wrote: > > Hi, > > I made a first attempt of video-ing my class of linear algebra 581 with > the first lecture I gav

[sage-devel] Re: C/C++ Library Versioning in Sage

2008-09-26 Thread mabshoff
On Sep 26, 3:23 am, Martin Albrecht <[EMAIL PROTECTED]> wrote: > Hi Michael and [sage-devel], > > at > >  http://trac.sagemath.org/sage_trac/ticket/4169#comment:7 > > mabshoff makes the following comment: > > """ > The version patches by Tim break on every BSD and Solaris where we do not use > t

[sage-devel] Re: Faster constants comparison

2008-09-26 Thread Simon King
Sorry for answering to myself: On Sep 26, 9:42 am, Simon King <[EMAIL PROTECTED]> wrote: > But i wonder one thing: Why is the following so slow, compared with > using RR or RDF? > sage: timeit('3 625 loops, best of 3: 523 µs per loop Probably since "3" is not a float yet: sage: PI=float(pi) sa

[sage-devel] Re: Inconsistency in interpreting the arguments of some functions

2008-09-26 Thread Georg S. Weber
Hi Robert, On 26 Sep., 10:35, Robert Bradshaw <[EMAIL PROTECTED]> wrote: > On Sep 26, 2008, at 12:48 AM, Georg S. Weber wrote: > > > Hi Robert, > > > thanks for your answer! > > > Just some thoughts of mine which might not be "thought to the end": > > Thanks for bringing this up. The constant I b

[sage-devel] C/C++ Library Versioning in Sage

2008-09-26 Thread Martin Albrecht
Hi Michael and [sage-devel], at http://trac.sagemath.org/sage_trac/ticket/4169#comment:7 mabshoff makes the following comment: """ The version patches by Tim break on every BSD and Solaris where we do not use the GNU ld per default. We now work around this by linking gld to ld, but this

[sage-devel] Re: Inconsistency in interpreting the arguments of some functions

2008-09-26 Thread Robert Bradshaw
On Sep 26, 2008, at 12:48 AM, Georg S. Weber wrote: > Hi Robert, > > thanks for your answer! > > Just some thoughts of mine which might not be "thought to the end": Thanks for bringing this up. The constant I being in SR has annoyed me too. > 1. > Having fixed "I" in Z / pZ, we have it in Qp,

[sage-devel] Re: Faster constants comparison

2008-09-26 Thread Robert Bradshaw
On Sep 26, 2008, at 12:44 AM, Simon King wrote: > Sorry for answering to myself: > > On Sep 26, 9:42 am, Simon King <[EMAIL PROTECTED]> wrote: >> But i wonder one thing: Why is the following so slow, compared with >> using RR or RDF? >> sage: timeit('3> 625 loops, best of 3: 523 µs per loop > > P

[sage-devel] Re: Inconsistency in interpreting the arguments of some functions

2008-09-26 Thread Georg S. Weber
Hi Robert, thanks for your answer! Just some thoughts of mine which might not be "thought to the end": 1. Having fixed "I" in Z / pZ, we have it in Qp, via Teichm"uller lift (and vice versa via natural reduction). 2. There is (for p being congruent to 1 mod 4) exactly one root "I" of the two r

[sage-devel] Re: Faster constants comparison

2008-09-26 Thread Simon King
Dear Paisa, On Sep 26, 9:26 am, Robert Bradshaw <[EMAIL PROTECTED]> wrote: ... > For consistency, we would like the type of 3 < f to depend only on   > the parent (e.g. type) of f. Otherwise things become too hard to   > reason with. However, in your case you might want to do something like > > n

[sage-devel] Re: Faster constants comparison

2008-09-26 Thread Robert Bradshaw
On Sep 26, 2008, at 12:15 AM, Paisa Seeluangsawat wrote: > Hi > > The command 'bool(3 makes plotting/computing piecewise-defined trigonometric functions > rather slow. > > The culprit seems to be sage.calculus.SymbolicExpression.__lt__ > (self, right). > It always yields a SymbolicEquation, whic

[sage-devel] Faster constants comparison

2008-09-26 Thread Paisa Seeluangsawat
Hi The command 'bool(3http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~--~~~~--~~--~--~---