Hello,
If x = symbols('x', real=True).
I found wrong results for limits with sign() function.
limit(sign(x), x, 0, '+') = 1, and limit(sign(x), x, 0, '-') = -1 ---> OK
But :
- limit(sign(ln(x)), x, 1, '+') = 1 (OK) but limit(sign(ln(x)), x, 1, '-')
= 0 instead of -1 ;
- limit(sign(sin(x)), x, 0, '+') = 0 and limit(sign(sin(x)), x, 0, '-') =
0, instead of 1 and -1 ;
- limit(sign(tan(x)), x, 0, '+') = 0 and limit(sign(tan(x)), x, 0, '-') =
0, instead of 1 and -1 ;
- limit(sign(cos(x)), x, pi/2, '+') = 0 and limit(sign(cos(x)), x, pi/2,
'-') = 0, instead of 1 and -1 ;
Etc......
KiRa2a,
(sympy.0.7.6.win32)
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