#4425: sqrt(4) returns a SymbolicComposition instead of the number 2!
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Reporter: was | Owner: somebody
Type: defect | Status: new
Priority: major | Milestone: sage-3.2
Component: basic arithmetic | Keywords:
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In Sage-3.1.4 we have this, which I consider wrong:
{{{
sage: n = 4
sage: type(sqrt(n))
<class 'sage.calculus.calculus.SymbolicComposition'>
sage: type(n.sqrt())
<type 'sage.rings.integer.Integer'>
}}}
I think sqrt(foo) should first check if foo has a sqrt method, and
if so call it. I realize there is a subtle problem here, because
the integer sqrt function calls the symbolic calculus one! So we
need some sort of architecture to fix this right. This isn't trivial.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4425>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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