A definition of a set by mentioning a defining property.
Intension
See also
Set ExtensionExplore with Wolfram|Alpha
References
Russell, B. "Definition of Number." Introduction to Mathematical Philosophy. New York: Simon and Schuster, 1971.Referenced on Wolfram|Alpha
IntensionCite this as:
Weisstein, Eric W. "Intension." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Intension.html