Minimal Surface: Is X a Minimal Surface?

[Ms Mrmr]

minimal surface ??

Hi ,
I have Q. about the minimal surface ... if we have this surface

X=(u-sinucoshv , 1-cosucoshv , -4sin(u/2)sinh(v/2))

it is minimal surface ?? and how know it ?

thanks .

 

[lavinia]

Calculate the mean curvature

 

[Ms Mrmr]

thank u lavinia