var('z')
z=x+y*I
f=1/(1-z)
u=f.real_part()
v=f.imag_part()
f(7+2*I)
a=u(x=7,y=2)
b=v(x=7,y=2)

Kreyszig-12.3-11-U (last edited 2010-12-18 07:29:40 by xxx)