Definition:Prismatic Surface/Directrix

Definition

Let $\SS$ denote a prismatic surface

The directrix of $\SS$ is the broken line which the parallel straight lines all intersect.

Also see

• Definition:Generator of Prismatic Surface

• Results about prismatic surfaces can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): prismatic surface
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): prismatic surface