allfact.spad line 194 [edit on github]
convert : % -> Symbol
This package exports a factor operation for multivariate polynomials with coefficients which are polynomials over some ring R
over which we can factor. It is used internally by packages such as the solve package which need to work with polynomials in a specific set of variables with coefficients which are polynomials in all the other variables.
factor(p)
factors a polynomial with polynomial coefficients.