On Fri, 20 Dec 2019, Jori Mantysalo wrote:
> On Fri, 20 Dec 2019, Mattia Villani wrote:
>
>> Here is my script:
>
> In my test the code seems to really eat much memory, so maybe it's not about
> changing allocation between heap and stack. Maybe you just run out of memory.
I left the code to run to a computer with 64 GB RAM when leaving on
vacation. However:
File
"/home/jm58660/sage/local/lib/python3.7/site-packages/sage/interfaces/maxima_lib.py",
line 986, in sr_limit
return max_to_sr(maxima_eval(([max_limit], L)))
File "sage/libs/ecl.pyx", line 805, in sage.libs.ecl.EclObject.__call__
(build/cythonized/sage/libs/ecl.c:7794)
File "sage/libs/ecl.pyx", line 377, in sage.libs.ecl.ecl_safe_apply
(build/cythonized/sage/libs/ecl.c:5456)
RuntimeError: ECL says: Maxima asks: Is
(_SAGE_VAR_r^5-20*_SAGE_VAR_r^4+36*_SAGE_VAR_r^3+20*_SAGE_VAR_r^2+720)
*((_SAGE_VAR_r^15+72*_SAGE_VAR_r^13+20*_SAGE_VAR_r^12+1296*_SAGE_VAR_r^11
+1440*_SAGE_VAR_r^10+25920*_SAGE_VAR_r^8)
*%e^(40/_SAGE_VAR_r^3)
+((-4*_SAGE_VAR_r^15)-288*_SAGE_VAR_r^13-80*_SAGE_VAR_r^12
-5184*_SAGE_VAR_r^11-5760*_SAGE_VAR_r^10
-103680*_SAGE_VAR_r^8)
*%e^(20/_SAGE_VAR_r^3)+4*_SAGE_VAR_r^15+288*_SAGE_VAR_r^13
+80*_SAGE_VAR_r^12+5184*_SAGE_VAR_r^11+5760*_SAGE_VAR_r^10
+103680*_SAGE_VAR_r^8) positive, negative or zero?
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "koe.sage.py", line 39, in <module>
print(limit(limit(kr.expr().subs(m=_sage_const_10 ,L=_sage_const_1
,A=_sage_const_6 ,alpha=_sage_const_2 ,beta=_sage_const_4
),th=_sage_const_0 ),r=_sage_const_0 ))
File
"/home/jm58660/sage/local/lib/python3.7/site-packages/sage/calculus/calculus.py",
line 1368, in limit
l = maxima.sr_limit(ex, v, a)
File
"/home/jm58660/sage/local/lib/python3.7/site-packages/sage/interfaces/maxima_lib.py",
line 990, in sr_limit
self._missing_assumption(s)
File
"/home/jm58660/sage/local/lib/python3.7/site-packages/sage/interfaces/maxima_lib.py",
line 1035, in _missing_assumption
raise ValueError(outstr)
ValueError: Computation failed since Maxima requested additional
constraints; using the 'assume' command before evaluation *may* help
(example of legal syntax is 'assume((r^5-20*r^4+36*r^3+20*r^2+720)
>0)', see `assume?` for more details)
Is (r^5-20*r^4+36*r^3+20*r^2+720)
*((r^15+72*r^13+20*r^12+1296*r^11
+1440*r^10+25920*r^8)
*%e^(40/r^3)
+((-4*r^15)-288*r^13-80*r^12
-5184*r^11-5760*r^10
-103680*r^8)
*%e^(20/r^3)+4*r^15+288*r^13
+80*r^12+5184*r^11+5760*r^10
+103680*r^8) positive, negative or zero?
--
Jori Mäntysalo
Tampereen yliopisto - Ihminen ratkaisee
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