Example 2.11. Show
that the image of the right half plane
under
the linear transformation
is
the half plane
.
Explore Solution 2.11.
Enter the function w = f[z].
![[Graphics:../Images/ComplexFunLinear_gr_324.gif]](../Images/ComplexFunLinear_gr_324.gif)
Solve for the inverse function, i.e. solve for z in terms of w.
![[Graphics:../Images/ComplexFunLinear_gr_326.gif]](../Images/ComplexFunLinear_gr_326.gif)
To solve for
, we use the computations.
![[Graphics:../Images/ComplexFunLinear_gr_329.gif]](../Images/ComplexFunLinear_gr_329.gif)
Or the following commands will also find the solution.
![[Graphics:../Images/ComplexFunLinear_gr_331.gif]](../Images/ComplexFunLinear_gr_331.gif)
Which is the right half plane
in
the w-plane. Use Mathematica to graph the
transformation.
![[Graphics:../Images/ComplexFunLinear_gr_334.gif]](../Images/ComplexFunLinear_gr_334.gif)
![[Graphics:../Images/ComplexFunLinear_gr_336.gif]](../Images/ComplexFunLinear_gr_336.gif)
![]()
We see that the image of the right half
plane
under
the linear transformation
is
the half plane
.