#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 | Resolution:
Keywords: | Merged in:
Authors: schymans | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by schymans):
Following on from the logic about function('f', x) being an expression,
not a function, why does this fail, then?
{{{
# If all of f, g and p are expressions, why does this fail?
x = var('x')
f = function('f', x)
print type(f)
g = function('g', x)
print type(g)
p = f.diff()
print type(p)
print p.subs_expr(f==g) # Outputs "D[0](f)(x)"
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17445#comment:9>
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