On Jun 5, 2009, at 2:15 AM, William Stein wrote:
>
> Hi,
>
> I'm writing a Sage "grand tour" worksheet with one section for each of
> the 39 main modules in SAGE_ROOT/devel/sage/sage/. For each, there is
> a quick summary of what it is about and where it comes from, then a
> short discussion fo where it is going next, followed by a couple of
> examples.
> You can see the current version here:
>
> http://480.sagenb.org/home/pub/45/
>
> If you have any corrections, additions, etc., to make, please email
> them to me in response to this email. Thanks. There are still about
> 15 sections left to write.
I think we've got more than 300,000 lines of code.
Robert-Bradshaws-Laptop:~/sage/sage-4.0/devel/sage-main robert$ cat
*.py */*.py */*/*.py */*/*/*.py */*/*.pyx */*/*/*.pyx | grep -v "^ *
$" | wc
884811 3774914 35147766
Robert-Bradshaws-Laptop:~/sage/sage-4.0/devel/sage-main robert$ cat
*.py */*.py */*/*.py */*/*/*.py */*/*.pyx */*/*/*.pyx | grep "sage:"
| wc
141677 571148 6443360
Algebras
- "has been hardly touched since" sounds pessimistic. I would say
that it remained untouched until earlier this year, when people
started contributing to it again (which leads into your examples).
Combinat
- Is there a good quote by the combinat people about how happy they
are to have switched? After all, we're trying to sell switching.
- It doesn't come across very strong that more than just porting
has been going on.
Ext
- Yes, we should remove all of the python_* files now that they're
shipped with Cython. It just hasn't been done yet (should be easy,
but not sure what the fallout might be).
Finance
- "time series of double precision numbers" would it be less accurate
to just say "lists of double precision numbers."
Graphing
- "graph_isom is old, and needs to go" -- should indicate what it's
been superseded by.
Gsl
- is syipy (nearly) a supserset of what GSL offers? If so, we should
say so, or at least that it has a large user community and handles
the needs of people in the numerical fields
Schemes
- Maybe show off elliptic curves a bit more (e.g. compute some BSD
invariants, or at least the rank/generators, of 37a).
Structure
An coercion example
sage: R.<x> = ZZ[]
sage: sage.structure.element.get_coercion_model().explain(1/2, x+4)
Action discovered.
Left scalar multiplication by Rational Field on Univariate
Polynomial Ring in x over Integer Ring
Result lives in Univariate Polynomial Ring in x over Rational Field
Univariate Polynomial Ring in x over Rational Field
sage: 1/2 * (x+4)
1/2*x + 2
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