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我试图设置sympy来计算衍生物。当我用简单的方程测试它时,我发现相同的答案(sympy计算与我自己的计算之间的平等是正确的)。然而,当我尝试更复杂的,当它无法正常工作(我也检查了wolfram alpha的答案)。sympy differential equality
这里是我的代码:
from __future__ import division
from sympy import simplify, cos, sin, expand
from sympy import *
x, y, z, t = symbols('x y z t')
k, m, n = symbols('k m n', integer=True)
f, g, h = symbols('f g h', cls=Function)
equation = (x**3*y-x*y**3)/(x**2+y**2)
equation2 = (x**4*y+4*x**2*y**3-y**5)/((x**2+y**2)**2)
pprint(equation)
print ""
pprint(equation2)
print diff(equation,x) == equation2