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Euclidean remainder : rem

rem returns the euclidean remainder between two polynomials (decreasing power division). If the polynomials are represented as expressions, the variable may be specified as a third argument.
Input :
Output :
To have the remainder of x2 + 2x + 4 by x2 + x + 2 we can also input :
Output :
i.e. le polynomial x + 2.

giac documentation written by Renée De Graeve and Bernard Parisse