Interval[{min, max}] represents the range of values between min and max. Interval[{min_1 , max_1}, {min_2 , max_2}, ...] represents the union of the ranges min_1 to max_1, ...
InverseCDF[dist, q] gives the inverse of the cumulative distribution function for the symbolic distribution dist as a function of the variable q.
KroneckerDelta[n_1, n_2, ...] gives the Kronecker delta \[Delta] Subscript[n, 1] Subscript[n, 2] ..., equal to 1 if all the n_i are equal, and 0 otherwise.
MatrixQ
(Built-in Mathematica Symbol) MatrixQ[expr] gives True if expr is a list of lists or a two-dimensional SparseArray object that can represent a matrix, and gives False otherwise. MatrixQ[expr, test] gives ...
symbol::tag is a name for a message.
NotebookEventActions is a notebook option that gives a list of actions to perform when specified events occur in connection with the notebook.
NotebookPut[expr] creates a notebook corresponding to expr and makes it the currently selected notebook in the front end. NotebookPut[] creates a new empty ...
ObservableModelQ[ss] gives True if the StateSpaceModel object ss is observable, and False otherwise.
PartitionsP[n] gives the number p (n) of unrestricted partitions of the integer n.
PartitionsQ[n] gives the number q (n) of partitions of the integer n into distinct parts.