Re: Issue 1568 in sympy: factoring is working too hard

2010-03-21 Thread sympy
Comment #5 on issue 1568 by smichr: factoring is working too hard http://code.google.com/p/sympy/issues/detail?id=1568 Also, perhaps factor should do deep factoring first to obtain a better factorization. Consider: df=-(1 - x)**2*(4 + x)/((2 + x)*(a + x)**2) - (1 - x)**2*(4 + x)/((2 +

Re: Issue 1869 in sympy: integrate(sin(log(x**2))) takes forever

2010-03-21 Thread sympy
Updates: Status: Accepted Labels: Integration Comment #1 on issue 1869 by asmeurer: integrate(sin(log(x**2))) takes forever http://code.google.com/p/sympy/issues/detail?id=1869 It does indeed take forever (and in the end, it can't do it), even if you set x to be positive,