 The converse is denoted symbolically as "G"', "G"T, "G"R, or other notations, depending on which terminology is used and which book or article is the source for the notation.Although there is little difference mathematically between a graph and its transpose, the difference may be larger in computer science, depending on how a given graph is represented.For instance, for the web graph, it is easy to determine the outgoing links of a vertex, but hard to determine the incoming links, while in the reversal of this graph the opposite is true.