proper subset

Let S be a set and let XS be a subset. We say X is a proper subsetMathworldPlanetmathPlanetmath of S if XS.

Title proper subset
Canonical name ProperSubset
Date of creation 2013-03-22 11:53:28
Last modified on 2013-03-22 11:53:28
Owner djao (24)
Last modified by djao (24)
Numerical id 7
Author djao (24)
Entry type Definition
Classification msc 03E20
Classification msc 03B22
Classification msc 03-00
Classification msc 03-01