DiracDelta (Built-in Mathematica Symbol)

DiracDelta[x] represents the Dirac delta function \[Delta](x). DiracDelta[x_1, x_2, ...] represents the multidimensional Dirac delta function \[Delta](x_1, x_2, ...).

DirectedEdge (Built-in Mathematica Symbol)

DirectedEdge[u, v] or u \[DirectedEdge] v represents a directed edge from u to v.

DirectedEdges (Built-in Mathematica Symbol)

DirectedEdges is an option for Graph, GraphPlot, and related functions that specifies whether edges should be taken to be directed.

DirectedGraph (Built-in Mathematica Symbol)

DirectedGraph[g] gives a directed graph from the undirected graph g.DirectedGraph[g, conv] gives a directed graph using the conversion conv.

DirectedGraphQ (Built-in Mathematica Symbol)

DirectedGraphQ[g] yields True if the graph g is a directed graph and False otherwise.

DirectedInfinity (Built-in Mathematica Symbol)

DirectedInfinity[] represents an infinite numerical quantity whose direction in the complex plane is unknown. DirectedInfinity[z] represents an infinite numerical quantity ...

Direction (Built-in Mathematica Symbol)

Direction is an option for Limit that specifies the direction in which the limit is taken.

Directive (Built-in Mathematica Symbol)

Directive[g_1, g_2, ...] represents a single graphics directive composed of the directives g_1, g_2, ....

DirectoryName (Built-in Mathematica Symbol)

DirectoryName["name"] extracts the directory name from the specification for a file.

Directory (Built-in Mathematica Symbol)

Directory[] gives the current working directory.