Example 3.4.  We know that [Graphics:Images/CauchyRiemannMod_gr_83.gif]  is differentiable and that  [Graphics:Images/CauchyRiemannMod_gr_84.gif].  We also have  

            [Graphics:Images/CauchyRiemannMod_gr_85.gif].  

It is easy to verify that Equations (3-16) are indeed satisfied:

    [Graphics:Images/CauchyRiemannMod_gr_86.gif]   and   [Graphics:Images/CauchyRiemannMod_gr_87.gif].  

Using Equations (3-14) and (3-15), respectively, to compute [Graphics:Images/CauchyRiemannMod_gr_88.gif]  gives

        [Graphics:Images/CauchyRiemannMod_gr_89.gif],   and   

        [Graphics:Images/CauchyRiemannMod_gr_90.gif],

as expected.

Explore Solution 3.4.

Enter the function f[z] and determine u[x,y] and v[x,y].

[Graphics:../Images/CauchyRiemannMod_gr_91.gif]




[Graphics:../Images/CauchyRiemannMod_gr_92.gif]

 

 

 

Verify that the Cauchy-Riemann equations hold.

[Graphics:../Images/CauchyRiemannMod_gr_93.gif]




[Graphics:../Images/CauchyRiemannMod_gr_94.gif]

 

 

 

We see that the Cauchy-Riemann equations hold.

Verify that  [Graphics:../Images/CauchyRiemannMod_gr_95.gif].  

[Graphics:../Images/CauchyRiemannMod_gr_96.gif]




[Graphics:../Images/CauchyRiemannMod_gr_97.gif]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(c) 2006 John H. Mathews, Russell W. Howell