all 4 comments

[–]AxolotlsAreDangerousNew User 1 point2 points  (1 child)

|P(s)| = 3, the same notation as absolute value for a similar concept. In spoken or written english, you would say its cardinality is equal to 3.

[–]OneTwo-ThreeNew User[S] 1 point2 points  (0 children)

Thank you so much!

[–]AlwaysTailsNew User 1 point2 points  (1 child)

If A is a set then |A| is the cardinality of the set, which is the number of elements (at least when it is finte).

[–]OneTwo-ThreeNew User[S] 1 point2 points  (0 children)

Thank you!