Remove redundant entries from a multivariate polynomial: function
trim() trims the array of non-significant zeroes as far as
possible without altering its value as a multipol; function
taylor() returns the multivariate Taylor expansion to a
specified order.
Usage
trim(a)
taylor(a,maxorder=NULL)
Value
Returns a multipol
Arguments
a
A multipol
maxorder
The multivariate order of the expansion returned;
default of NULL means to return a unaltered