Re: Sage

Posted by Owen Densmore on
URL: http://friam.383.s1.nabble.com/Sage-tp1570939p1570975.html

On Nov 23, 2008, at 3:06 PM, Marcus G. Daniels wrote:
> Few things I noticed about Sage:
<snip>

Hi Marcus.  I've sent a few more messages to wedtech, I wasn't sure  
friam'd be interested.  I attach a couple of the wedtech emails.

I'm really starting to like Sage quite a bit.  It is huge, and in some  
ways a bit too monolithic .. i.e. including everything in one huge  
package even though you may have most on your system already.  And I  
do find using their web based distro fine too, so you really don't  
have to download anything .. it seems fast enough on the web.

Anyway: here are the forwards:

    -- Owen

Begin forwarded message:

> From: Owen Densmore <[hidden email]>
> Date: November 19, 2008 4:43:47 PM MST
> To: WedTech <[hidden email]>
> Subject: Sage (scientific computing software) - Wikipedia, the free  
> encyclopedia
>
> Just in case someone was curious about the sage math system  
> mentioned today:
>  http://en.wikipedia.org/wiki/Sage_(computer_algebra_system)
>  http://www.sagemath.org/
> It is kinda raw, but I think it will succeed.  Several nifty things  
> about it:
>
> - It provides a notebook style similar to mathematica, as well as  
> the more traditional python/ipython terminal interface.
>
> - The notebook actually uses your browser, via a small local  
> server!  This also lets it be an on-line tool.  Beam into: http://www.sagenb.org/ 
>  to get it working over the web.
>
> - It integrates just about every open source math library into a  
> python.  I had no idea just how much of scientific computing had  
> moved to python.  R, for example has rpy.  The entire GSL (Gnu  
> Science Library) has pygsl.  Somehow numpy/scipy/matplotlib all got  
> rationally integrated as the matrix/plotting underpinnings.
>
>    -- Owen

Begin forwarded message:

> From: Owen Densmore <[hidden email]>
> Date: November 19, 2008 7:09:07 PM MST
> To: [hidden email]
> Subject: Re: [WedTech] Sage (scientific computing software) -  
> Wikipedia, the free encyclopedia
>
> [I love answering my own posts!]
>
> So I started looking at the docs a bit more and found out that the  
> notebook format (Simon's comment during today's chat) Sage uses is  
> pretty sophisticated.  If you start Sage on your own system, then  
> look at this URL:
>  http://localhost:8000/doc/live/tut/node3.html
> or
>  http://www.sagenb.org/doc/live/tut/index.html online,
> .. you'll get the Sage tutorial *as a notebook*  .. i.e. the pdf/
> html/... format the tutorial comes in is also available as a  
> notebook where all the examples in the tutorial are available live!
>
> I'm really impressed!
>
> Also, beyond all the python stuff they have, they also use jsMath
>  http://www.math.union.edu/~dpvc/jsMath/
> .. a javascript TeX renderer.  I think I'll figure out how to get my  
> website using jsMath, its pretty nice.
>
>    -- Owen
>

>
>

Begin forwarded message:

> From: Owen Densmore <[hidden email]>
> Date: November 23, 2008 9:07:31 AM MST
> To: WedTech <[hidden email]>
> Subject: Sage Reference Manual
>
> The Sage reference book:
>  http://www.sagemath.org/doc/ref/ref.html
> .. is a sort of raw dump, or log, of all the stuff in Sage, and is  
> HUGE!  The pdf version runs to 3990 pages!
>
> So I've taken to searching the pdf to find some of the odd corners.  
> (It alas does not have its own search function in the html version)
>
> Carl: here's Category Theory, for example:
>  http://www.sagemath.org/doc/ref/module-sage.categories.category.html
> .. and monoids get their own section immediately following category  
> theory, followed by General Rings, Ideals and Morphisms.
>
> I'm a bit puzzled by Sage's focus on Rings as the primary numeric  
> formalism.  R, Q, Z etc are presented as rings rather than fields,  
> for example.  I discovered one reason .. it allows Matrices to be  
> included in them due to Rings not requiring commutivity of the  
> multiplicative operator.
>
>    -- Owen
>
>

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