On Nov 27, 2011, at 12:24 , Artur wrote:
> John
> Tell me yet is possible to count rank of my curve over rational field
> I was try
> E.mwrank
> <bound method EllipticCurve_rational_field.mwrank of Elliptic Curve defined
> by y^2
It might help you to know the following:
The TAB key can provide information about what possibilities are available from
the string that you have just typed. As you have discovered, if you type a
"partial string", TAB will give you completions that are known.
TAB following the "." will give you names of both methods (functions) and
variables associated to the name you have just typed, as for "E.". Not all
names will work for a given instance; what will actually work depends on
exactly how the instance was created (Sage is based on Python [see below],
which has a good "object" structure underlying it).
Also, once you have a complete name, "?" and "??" will give you documentation
("?") or documentation + implementation (if possible) ("??") for the name. Try
typing "E?", once you have defined E as an elliptic curve (you get the same
with "Elliptic_Curcve?").
It may also be helpful to review documentation on Python, and its "class"
structures (see the documentation link on <http://www.python.org>). Python is
the underlying language for both the Sage system and the Sage interpreter, so
understanding that will help you to understand Sage.
We don't put all of the possible details for all of Sage's functions and
classes into documentation at any one time; Sage is dynamically changing, and
to do so would be a lot of work. Instead, we rely on the above "on-line"
mechanisms to supplement the documentation. A fair amount is automatically
culled from source and put into various manuals (cf the documentation available
in your installation, or on-line at <http://sagemath.org>).
Finally (if you've gotten this far), your experience with "mwrank" shows that
this is a method, i.e., a function/procedure. Typing "E.mwrank?" will give you
information about how to use it.
HTH
Justin
--
Justin C. Walker, Curmudgeon-At-Large
Institute for the Enhancement of the Director's Income
--------
When LuteFisk is outlawed,
Only outlaws will have LuteFisk
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