#12737: Remove simplify_radical() from simplify_full()
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Reporter: mjo | Owner: mjo
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.11
Component: symbolics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Michael Orlitzky | Merged in:
Dependencies: #12845 | Stopgaps:
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Comment (by kcrisman):
> Here's another example of unexpected behavior introduced by using
simplify_radical as a part of simplify_full:
[https://groups.google.com/forum/?fromgroups=#!topic/sage-
devel/Pq9hyOTzrL8].
In that same thread: Robert D. of Maxima reports
{{{
> sage: u, v = var('u, v', domain='real')
> sage: sqrt(-1/(u^2+v^2-1)).simplify_radical() # This will hang
This is a bug in Maxima:
(%i2) radcan (sqrt (-1 / (u^2 + v^2 - 1))), domain=complex;
It waits apparently forever here -- but it is actually looping over
*ALPHA (not sure why) which is a large prime number (8388593).
(%i3) :lisp (setq *alpha 17)
17
(%i3) radcan(sqrt(-1/(u^2+v^2-1))), domain=complex;
(%o3) 1/sqrt(-v^2-u^2+1)
I've reported this as bug # 2605.
}}}
E.g. [http://sourceforge.net/p/maxima/bugs/2605/ Maxima 2605]. We may
want to open a ticket for this or something, maybe along with #11912.
----
I'll take a look at the failures in the new German tutorial at some point
today, it's probably not a big deal.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12737#comment:20>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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