#11888: Sage is missing the lambert_w function
----------------------------------------------------------------+-----------
Reporter: benjaminfjones |
Owner: burcin
Type: defect |
Status: needs_review
Priority: minor |
Milestone: sage-5.0
Component: symbolics |
Resolution:
Keywords: lambert_w symbolics conversion maxima sd35.5 | Work
issues:
Report Upstream: N/A |
Reviewers: Keshav Kini, Karl-Dieter Crisman, Fredrik Johansson, Burcin Erocal
Authors: Benjamin Jones | Merged
in:
Dependencies: #12507 |
Stopgaps:
----------------------------------------------------------------+-----------
Changes (by benjaminfjones):
* status: needs_work => needs_review
Comment:
Success!
Symbolic and numerical integration now work as expected for the principle
branch. I added doctests to indicate what is and is not implemented.
----
One other comment, to indicate what causes errors, I want to add doctests
to `lambert_w` such as:
{{{
sage: integral(lambert_w(1,x), x)
ERROR: An unexpected error occurred while tokenizing input
...
RuntimeError: ECL says: Error executing code in Maxima: lambert_w:
expected exactly 1 arguments.
}}}
and
{{{
sage: numerical_integral(lambert_w(x), 0, 1)
Exception TypeError: "function not supported for these types, and can't
coerce safely to supported types" in 'sage.gsl.integration.c_ff' ignored
...
(0.0, 0.0)
}}}
but the doctest framework doesn't recognize the `Exception TypeError` and
it seems to automatically fail if a `RuntimeError` is raised. If I put the
latter 4 lines in the docstring for `lambert_w`, it fails doctesting, the
framework only sees the `(0.0, 0.0)` part at the end. Is there a way
around either of these issues?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11888#comment:38>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
