#17445: Missing documentation of derivative operator/notation
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Reporter: schymans | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.5
Component: symbolics | Keywords:
Merged in: | Authors: schymans
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Taking the derivative of a symbolic function returns the D-notation:
sage: var('x y z')
sage: f(x) = function('f',x,y,z);
sage: f(x).diff(x,y)
D[0, 1](f)(x, y, z)
Unfortunately, the meaning of this notation is not documented anywhere,
neither in diff(), nor in derivative() nor in function(). There is a ton
of tickets about improving ambiguities and malfunctions related to this
notation, but it would be very helpful to at least document how it is
supposed to work and what it means if a user sees output as above.
See here for related tickets:
http://trac.sagemath.org/ticket/6344
http://trac.sagemath.org/ticket/6480
http://trac.sagemath.org/ticket/6756
http://trac.sagemath.org/ticket/12796
and this discussion:
https://groups.google.com/forum/#!topic/sage-devel/_xD5lymnTuo
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Ticket URL: <http://trac.sagemath.org/ticket/17445>
Sage <http://www.sagemath.org>
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