TotalWidth is an option which can be set for output streams to specify the maximum total number of characters of text that should be printed for each output expression. Short ...
VectorColorFunctionScaling is an option for graphics functions which specifies whether arguments supplied to a vector color function should be scaled to lie between 0 and 1.
$KernelCount gives the number of subkernels available for parallel computations.
FiniteAbelianGroupCount[n] gives the number of finite Abelian groups of order n.
LowerTriangularize[m] gives a matrix in which all but the lower triangular elements of m are replaced with zeros. LowerTriangularize[m, k] replaces with zeros only the ...
CoefficientList[poly, var] gives a list of coefficients of powers of var in poly, starting with power 0. CoefficientList[poly, {var_1, var_2, ...}] gives an array of ...
Diagonal[m] gives the list of elements on the leading diagonal of the matrix m.Diagonal[m, k] gives the elements on the k\[Null]^th diagonal of m.
FreeQ
(Built-in Mathematica Symbol) FreeQ[expr, form] yields True if no subexpression in expr matches form, and yields False otherwise. FreeQ[expr, form, levelspec] tests only those parts of expr on levels ...
$System
(Built-in Mathematica Symbol) $System is a string describing the type of computer system on which Mathematica is being run.
InString[n] is a global object that is assigned to be the text of the n\[Null]^th input line.