VectorStyle is an option to VectorPlot, ListVectorPlot, and related functions that determines the style to use for drawing field vectors.
VertexCount[g] gives a count of the number of vertices in the graph g.VertexCount[g, patt] gives a count of the number of vertices that match the pattern patt.
VertexQ
(Built-in Mathematica Symbol) VertexQ[g, v] yields True if v is a vertex in the graph g and False otherwise.
VertexReplace[g, {v_1 -> w_1, v_2 -> w_2, ...}] replaces each vertex v_i in the graph g by w_i.
VertexShape is an option and property for Graph and related functions that specifies the graphics used for vertices.
VertexSize is an option and property for Graph and related functions that specifies the size used for vertices.
VertexStyle is an option and property for Graph and related functions that specifies what style to use for vertices.
WattsStrogatzGraphDistribution[n, p] represents the Watts\[Dash]Strogatz graph distribution for n-vertex graphs with rewiring probability p.WattsStrogatzGraphDistribution[n, ...
WeightedAdjacencyMatrix[g] gives the adjacency matrix of edge weights of the graph g.
Xnor
(Built-in Mathematica Symbol) Xnor[e_1, e_2, ...] is the logical XNOR (not XOR) function. It gives True if an even number of the e_i are True, and the rest are False. It gives False if an odd number of ...