x, either a list or sequence of ring variables, a list or sequence of integers denoting indices of ring variables, or a single ring element or integer index. The default value is: all of the variables
Consequences:
Each variable not in the set of variables x is considered a coefficient
See also
coefficients -- get the monomials and coefficients of a polynomial or matrix
Functions with optional argument named Variables:
basis(...,Variables=>...) -- see basis -- basis or generating set of all or part of a ring, ideal or module
coefficients(...,Variables=>...) -- see coefficients -- get the monomials and coefficients of a polynomial or matrix