#16468: Assumption that all symbolic variables are non-zero.
-------------------------+-------------------------------------------------
Reporter: anton_t | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: misc | Keywords: symbolic expressions
Merged in: | simplification cancelation
Reviewers: | Authors:
Work issues: | Report Upstream: N/A
Commit: | Branch:
Stopgaps: | Dependencies:
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Sage assumes all symbolic variables are non-zero at all times when doing
automatic simplifications.
For example:
{{{
sage: var('x')
sage: sin(x)/sin(x)
1
}}}
Or even more explicitly:
{{{
sage: var('x')
x
sage: assume(x==0)
sage: bool(x==0)
True
sage: x/x
1
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16468>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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