UpSetDelayed (Built-in Mathematica Symbol)

lhs ^:= rhs assigns rhs to be the delayed value of lhs, and associates the assignment with symbols that occur at level one in lhs.

UpSet (Built-in Mathematica Symbol)

lhs ^= rhs assigns rhs to be the value of lhs, and associates the assignment with symbols that occur at level one in lhs.

UpTeeArrow (Built-in Mathematica Symbol)

UpTeeArrow[x, y, ...] displays as x\[UpTeeArrow]y\[UpTeeArrow]....

UpValues (Built-in Mathematica Symbol)

UpValues[f] gives a list of transformation rules corresponding to all upvalues defined for the symbol f.

UsingFrontEnd (Built-in Mathematica Symbol)

UsingFrontEnd[expr] evaluates expr, making use of a front end if necessary.

ValidationLength (Built-in Mathematica Symbol)

ValidationLength is an option to FindSequenceFunction and related functions that specifies the number of elements in the input sequence that should be used to validate a ...

ValueQ (Built-in Mathematica Symbol)

ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

Variables (Built-in Mathematica Symbol)

Variables[poly] gives a list of all independent variables in a polynomial.

VarianceEquivalenceTest (Built-in Mathematica Symbol)

VarianceEquivalenceTest[{data_1, data_2, ...}] tests whether the variances of the data_i are equal. VarianceEquivalenceTest[{data_1, ...}, " property"] returns the value of " ...

VarianceEstimatorFunction (Built-in Mathematica Symbol)

VarianceEstimatorFunction is an option for LinearModelFit and NonlinearModelFit which specifies the variance estimator to use.