#6854: Something weird in the implementation of InfinitePolynomialRing
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Reporter: ncohen | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-4.1.2
Component: symbolics | Keywords:
Reviewer: | Author:
Merged: |
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Hello !!
I know nothing about Symbolics in Sage, but I will be using
InfinitePolynomialRing and I think the following code can be considered a
bug. I create an expression using an element from InfinitePolynomialRing,
on which I use "Tab" to list its methods, some of them not being printed.
Example :
{{{
sage: P.<x>=InfinitePolynomialRing(RR)
sage: e=x[1]+x[3]
sage: e.
e.abs e.footprint
e.multiplicative_order e.save
e.additive_order e.is_nilpotent e.n
e.squeezed
e.base_extend e.is_one e.order
e.stretch
e.base_ring e.is_unit e.parent
e.subs
e.category e.is_zero
e.polynomial e.substitute
e.coefficient e.lc e.reduce
e.symmetric_cancellation_order
e.db e.lm e.rename
e.tail
e.dump e.lt
e.reset_name e.variables
e.dumps e.max_index e.ring
e.version
sage: e.constant_coefficient()
0.000000000000000
}}}
Besides, I do not understand why ( and I would really need it the other
way ) inequalities on such expression return binaries instead of being
kept symbolic :
{{{
sage: e<3
False
}}}
But this may be intentional, even though I do not like it :-)
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6854>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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