ControllableModelQ[ss] yields True if the StateSpaceModel object ss is controllable, and False otherwise.
CreateDialog[expr] creates a dialog notebook containing expr and opens it in the front end.CreateDialog[expr, obj] replaces the notebook represented by the notebook object ...
CriticalSection[{var_1, var_2, ...}, expr] locks the variables var_i with respect to parallel computation, evaluates expr, then releases the var_i.
DepthFirstScan[g, s, {"event_1" -> f_1, "event_2" -> f_2, ...}] performs a depth-first scan of the graph g starting at the vertex s and evaluates f_i whenever "event_i" ...
DiscreteDelta[n_1, n_2, ...] gives the discrete delta function \[Delta] (n_1, n_2, ...), equal to 1 if all the n_i are zero, and 0 otherwise.
DistributionParameterQ[dist] yields True if dist is a valid distribution, and yields False otherwise.
Divisible[n, m] yields True if n is divisible by m, and yields False if it is not.
FortranForm[expr] prints as a Fortran language version of expr.
Install
(Built-in Mathematica Symbol) Install["name"] starts a MathLink-compatible external program and installs Mathematica definitions to call functions in it.
Integers represents the domain of integers, as in x \[Element] Integers.