Sorry. For the first one integral(x,x,algorithm='mathematica_free')
You can replace the first x by any function; a previous problem was solved in #22641 <https://trac.sagemath.org/ticket/22641> but now I does not work. For the the second one the problem is with integral(sin(x^2),x,algorithm='mathematica_free') and I presume it is due to the non-existence of Fresnel integrals in sage. It works for other integrals, and it works also importing sympy as you did. El domingo, 12 de noviembre de 2017, 11:57:06 (UTC+1), vdelecroix escribió: > > You should give the command that leads you to the error. > > Concerning sympy, note that you can use it directly within Sage > > sage: import sympy > sage: x = sympy.Symbol('x') > sage: sympy.integrate(sympy.sin(x^2), x) > 3*sqrt(2)*sqrt(pi)*fresnels(sqrt(2)*x/sqrt(pi))*gamma(3/4)/(8*gamma(7/4)) > > On 12/11/2017 11:30, Enrique Artal wrote: > > I was prepairing some exercises and I got some errors using differente > > algorithms for integral, using version 8.0. Integrating with > > mathematica_free, I got this error: > > Traceback (most recent call last): > > File "<stdin>", line 1, in <module> > > File "_sage_input_4.py", line 10, in <module> > > exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 > > -*-\\n" + > > > _support_.preparse_worksheet_cell(base64.b64decode("aW50ZWdyYWwoeCx4LGFsZ29yaXRobT0nbWF0aGVtYXRpY2FfZnJlZScp"),globals())+"\\n"); > > > > execfile(os.path.abspath("___code___.py")) > > File "", line 1, in <module> > > > > File "/tmp/tmpfvk1XJ/___code___.py", line 2, in <module> > > exec compile(u"integral(x,x,algorithm='mathematica_free')" + '\n', > '', > > 'single') > > File "", line 1, in <module> > > > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/misc/functional.py", > > > > line 721, in integral > > return x.integral(*args, **kwds) > > File "sage/symbolic/expression.pyx", line 12275, in > > sage.symbolic.expression.Expression.integral > > > (/usr/local/sage-8.0/src/build/cythonized/sage/symbolic/expression.cpp:69945) > > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py", > > > > line 795, in integrate > > return integrator(expression, v, a, b) > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/symbolic/integration/external.py", > > > > line 97, in mma_free_integrator > > page = page[page.index('"inputForm"'):page.index('"outputForm"')] > > ValueError: substring not found > > > > > > If I try integral(sin(x^2),x,algorithm='sympy') I get: > > > > Traceback (most recent call last): > > File "<stdin>", line 1, in <module> > > File "_sage_input_20.py", line 10, in <module> > > exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 > > -*-\\n" + > > > _support_.preparse_worksheet_cell(base64.b64decode("aD1pbnRlZ3JhbChzaW4oeF4yKSx4LGFsZ29yaXRobT0nc3ltcHknKQ=="),globals())+"\\n"); > > > > execfile(os.path.abspath("___code___.py")) > > File "", line 1, in <module> > > > > File "/tmp/tmpK8eQi1/___code___.py", line 3, in <module> > > exec compile(u"h=integral(sin(x**_sage_const_2 > ),x,algorithm='sympy')" > > + '\n', '', 'single') > > File "", line 1, in <module> > > > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/misc/functional.py", > > > > line 721, in integral > > return x.integral(*args, **kwds) > > File "sage/symbolic/expression.pyx", line 12275, in > > sage.symbolic.expression.Expression.integral > > > (/usr/local/sage-8.0/src/build/cythonized/sage/symbolic/expression.cpp:69945) > > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/symbolic/integration/integral.py", > > > > line 795, in integrate > > return integrator(expression, v, a, b) > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sage/symbolic/integration/external.py", > > > > line 56, in sympy_integrator > > return result._sage_() > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sympy/core/mul.py", > > line 1572, in _sage_ > > s *= x._sage_() > > File > > > "/usr/local/sage-8.0/local/lib/python2.7/site-packages/sympy/core/function.py", > > > > line 707, in _sage_ > > func = getattr(sage, fname) > > AttributeError: 'module' object has no attribute 'fresnels' > > > > It seems that fresnels is defined in sympy but not in sagemath, Is it > > possible to correct these errors? Thanks, Enrique. > > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
