 This matrix corresponds to a stepfunction formula_49,
defined by partitioning formula_50 into intervals 
formula_51 such that formula_52 has interior
formula_53
and for each formula_54, setting formula_55 equal to the 
formula_56
entry of formula_48.This function formula_58 is the associated graphon of the graph formula_59.In general, if we have a sequence of graphs formula_60 where the number of vertices of formula_29 goes to infinity, we can analyze the
limiting behavior of the sequence by considering the limiting behavior of the functions formula_62.