DemandIndex
End Subexpression moves the cursor from a subexpression to the expression at the n\[Null]^th level.
Booleans represents the domain of Booleans, as in x \[Element] Booleans.
DependentVariables is an option which specifies the list of all objects that should be considered as dependent variables in equations that have been supplied.
Entropy
(Built-in Mathematica Symbol) Entropy[list] gives the base E information entropy of the values in list.Entropy[k, list] gives the base k information entropy.
FullForm[expr] prints as the full form of expr, with no special syntax.
GeodesicDilation[marker, mask] gives the fixed point of the geodesic dilation of the image marker constrained by the image mask.
Mean
(Built-in Mathematica Symbol) Mean[list] gives the statistical mean of the elements in list. Mean[dist] gives the mean of the symbolic distribution dist.
NumberMarks is an option for InputForm and related functions that specifies whether ` marks should be included in the printed forms of approximate numbers.
OneIdentity is an attribute that can be assigned to a symbol f to indicate that f[x], f[f[x]], etc. are all equivalent to x for the purpose of pattern matching.