 
 
 
5.29.2  Polynomials of several variables: 
%%%{ %%%}
A polynomial of several variables is represented
- 
by a symbolic expression 
- or by a dense recursive 1-d representation like above
- or by a sum of
monomials with non-zero coefficients (distributed sparse
representation).
 A monomial with several variables is represented by a coefficient and a
list of integers (interpreted as powers of a variable list). The 
delimiters for monomials are
%%%{ and %%%}, for example 3x2y is represented by
%%%{3,[2,1]%%%} with respect to the variable list 
[x,y]).
 
 
