# Math Help - regular surface

1. ## regular surface

Which regular surface contains the curve $\alpha(t) = (e^tcos(t), e^tsin(t), e^t)$?

2. $\mbox{Rotate }\alpha(u)=(e^u,e^u,e^u)\mbox{ about the z-axis to get }\sigma(u,v)=(e^ucos(v),e^usin(v),e^u).$

3. Originally Posted by whipflip15
$\mbox{Rotate }\alpha(u)=(e^u,e^u,e^u)\mbox{ about the z-axis to get }\sigma(u,v)=(e^ucos(v),e^usin(v),e^u).$
That is a parametrization, but what is the regular surface?

4. Do you know what a regular surface is?

'A parameterized surface is regaler if...?'

Finish the sentence then test the surface i gave.