Editing Shell integration (section)

{{Short description|Method for calculating the volume of a solid of revolution}}
[[File:Shell integral undergraph - around y-axis.png|thumb|right|300px|A volume is approximated by a collection of hollow cylinders. As the cylinder walls get thinner the approximation gets better. The limit of this approximation is the shell integral.]]

{{Calculus |Integral}}

'''Shell integration''' (the '''shell method''' in [[integral calculus]]) is a method for [[calculation|calculating]] the [[volume]] of a [[solid of revolution]], when integrating along an axis ''perpendicular to'' the axis of revolution. This is in contrast to [[disc integration]] which integrates along the axis ''parallel'' to the axis of revolution.