NInverseFourierCoefficient[expr, n, t] gives a numerical approximation to the function, evaluated at t, whose Fourier exponential series representation has coefficients given ...

Bicomponents[g] gives the biconnected components of the undirected graph g.

CommunityStructurePartition[g] gives the partition of a graph g into communities.

NeighborhoodVertices[g, i, r] gives vertices that can be reached from vertex i within r hops.NeighborhoodVertices[g, i] gives vertices that can be reached from vertex i.

ConfidenceLevel is an option for LinearModelFit and other fitting functions that specifies the confidence level to use in generating parameter and prediction intervals.

If[condition, t, f] gives t if condition evaluates to True, and f if it evaluates to False. If[condition, t, f, u] gives u if condition evaluates to neither True nor False.

LetterQ[string] yields True if all the characters in the string are letters, and yields False otherwise.

TranslationTransform[v] gives a TransformationFunction that represents translation of points by a vector v.

VertexCoordinates is an option to Graph and related functions that specifies the coordinates to use to place the center of vertices.

When you enter a piece of input such as 2+2, Mathematica first recognizes the + as an operator and constructs the expression Plus[2,2], then uses the built-in rules for Plus ...