复变函数f(z)可导的充要条件是：函数f(z)的偏导数u'x,u'y,v'x,v'y存在,且连续,并满足柯西—黎曼方程（即u‘x=v'y;u'y=-v'x）z=x-y^2iu=x;v=-y^2 u'x=1 v'y=-2y u'y=0 v'x=0u'x;v'y,u'y,v'x存在且连续u'x≠v'y所以该...