Cher Roland,
Just to be sure, could you try in a *Python* Jupyter notebook to run
a cell with the following content
import cypari2
pari = cypari2.Pari()
pari(109604757131194562205071319966444535807).issquarefree()
(I expect the very same error to occur, but it is better to double
check)
Vincent
Le 03/03/2019 à 18:48, Rolandb a écrit :
Dear Vincent,
Indeed, sagecell <https://sagecell.sagemath.org/> gives the correct answer.
I'm not an expert, so whether I use cygwin I do not know.
Jupyter and Notebook with Windows 8.6 give both segfault.
Notebook 8.6:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_3.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("YWE9MTA5NjA0NzU3MTMxMTk0NTYyMjA1MDcxMzE5OTY2NDQ0NTM1ODA3CnByaW50IGlzX3NxdWFyZWZyZWUoYWEp"),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmpXtAFoN/___code___.py", line 4, in <module>
exec compile(u'print is_squarefree(aa)
File "", line 1, in <module>
File "/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.py", line 2852, in is_squarefree
return e.is_squarefree()
File "sage/rings/integer.pyx", line 5859, in
sage.rings.integer.Integer.is_squarefree (build/cythonized/sage/rings/integer.c:35954)
File "cypari2/gen.pyx", line 3347, in cypari2.gen.Gen.issquarefree
cysignals.signals.SignalError: Segmentation fault
Sage 6.9 notebook (via Window, thus 32 bit) yields the correct answer!
Vincent, I hope this information helps.
Roland
Op zondag 3 maart 2019 11:53:17 UTC+1 schreef vdelecroix:
Hi,
I can not reproduce (I am using Linux). Let me copy your traceback
that was a mess because of linebreaks
---------------------------------------------------------------------------
SignalError Traceback (most recent call
last)
<ipython-input-35-801031bbe3a3> in <module>()
1 aa=Integer(109604757131194562205071319966444535807)---->
2 print is_squarefree(aa)
/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.pyc
in is_squarefree(n)
2850
2851 try:->
2852 return e.is_squarefree()
2853 except AttributeError:
2854 pass
/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/rings/integer.pyx
in sage.rings.integer.Integer.is_squarefree
(build/cythonized/sage/rings/integer.c:35954)()
5857 False
5858 """->
5859 return self.__pari__().issquarefree()
5860
5861 cpdef __pari__(self):
cypari2/gen.pyx in cypari2.gen.Gen.issquarefree()
SignalError: Segmentation fault
This seems to be a problem with cypari2 in cygwin (could you confirm
that you are using cygwin?). If so, you should try to reproduce the
problem without Sage by launching Python inside cygwin and then
>>> import cypari2
>>> pari = cypari2.Pari()
>>> pari(109604757131194562205071319966444535807).issquarefree()
Vincent
Le 03/03/2019 à 11:44, Rolandb a écrit :
Hi, the following result is probably not intended:
Sage 8.6 Windows
aa=109604757131194562205071319966444535807
print is_squarefree(aa)
---------------------------------------------------------------------------SignalError
Traceback (most recent call
last)<ipython-input-35-801031bbe3a3> in <module>() 1
aa=Integer(109604757131194562205071319966444535807)----> 2 print
is_squarefree(aa)
/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/arith/misc.pyc
in is_squarefree(n) 2850 2851 try:-> 2852 return
e.is_squarefree() 2853 except AttributeError: 2854 pass
/opt/sagemath-8.6/local/lib/python2.7/site-packages/sage/rings/integer.pyx
in sage.rings.integer.Integer.is_squarefree
(build/cythonized/sage/rings/integer.c:35954)() 5857 False
5858 """-> 5859 return self.__pari__().issquarefree()
5860 5861 cpdef __pari__(self):
cypari2/gen.pyx in cypari2.gen.Gen.issquarefree()
SignalError: Segmentation fault
Roland
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