#7512: fast_callable should respect the variable order in callable symbolic
expressions (treating them like lambda functions rather than like
expressions)
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Reporter: jason | Owner: was
Type: defect | Status:
needs_review
Priority: major | Milestone:
sage-4.4.3
Component: graphics | Keywords:
Author: Robert Bradshaw, Tim Dumol, Jason Grout | Upstream: N/A
Reviewer: Ross Kyprianou | Merged:
Work_issues: |
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Comment(by jason):
Replying to [comment:10 kcrisman]:
> 2. Why did you decide again that 1 and 3 should be different from 2 and
4? I'm just curious, since this seems VERY counter-intuitive to me, since
we go to the trouble of having g(x=1,y=2)==g(y=2,x=1) for callable guys
and not allowing other variable names in them (this came up in the PREP
workshop from a user question).
I think in retrospect, I agree that this patch does not have the right
design decision. Instead of throwing away the var values, we should make
the default be the x.args() (so that someone doesn't need to specify the
vars keyword if passing in a CallableSymbolicExpression).
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7512#comment:13>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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