List-Oriented Tests
- ArrayQ — test whether an object is a tensor of a given rank
- DisjointQ — test whether two lists do not have common elements
- IntersectingQ — test whether two lists have common elements
- LevelQ — test whether is a valid level specification
- MatrixQ — gives 'True' if the given argument is a list of equal-length lists
- MemberQ — test whether an element is a member of a list
- NotListQ — test if an expression is not a list
- SubsetQ — test if a list is a subset of another list
- VectorQ — test whether an object is a vector