#12795: Invalid simplification from Expression.simplify_trig()
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Reporter: mjo | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-5.11
Component: symbolics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Comment (by kcrisman):
Thanks for pointing out #12795, which got me trying this out again...
Pretty sure this is invalid.
{{{
sage: G = F(u=b)
sage: H = G.simplify_trig()
sage: R = RealField(1000)
sage: L = [(j,H(R(j))) for j in srange(-1,.2,.001)]
sage: M = [(a,R(b)) for a,b in L] # should have done this in one step, but
oh well
sage: points(M)+plot(G,(x,-1,.2),color='red')
}}}
yields the following bee-yoo-tiful picture that every student of
mathematics should have the chance to understand - why you don't just plug
and chug:
[[Image(better.png)]]
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12795#comment:5>
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