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]).