Set

To test if x belongs to a set S, we use either
x in S
or
x (- S

To test if x is an element of a matrix or list S, one can only use

x in S
To test if S is subset, true subset, superset, or true superset of a set T, use
S (= T
S (< T
S =) T
S >) T
respectively.



oz 2009-12-22