poly polynomial definition Calling Sequence p = poly(a, vname, ["flag"]) Arguments a a matrix or real number vname a string, the symbolic variable name. The string must be 4 characters max. "flag" string ("roots", "coeff"), default value is "roots". Shortcuts can be also used: "r" for "roots" and "c" for "coeff". Description If a is a matrix, p is the characteristic polynomial i.e. `determinant(x*eye()-a)`, x being the symbolic variable. If v is a vector, `poly(v,"x",["roots"])` is the polynomial with roots the entries of v and "x" as formal variable. (In this case, roots and poly are inverse functions). Note that Infinite roots gives zero highest degree coefficients. `poly(v,"x","coeff")` creates the polynomial with symbol "x" and with coefficients the entries of v (`v(1)` is the constant term of the polynomial). (Here poly and coeff are inverse functions). `s=poly(0,"s")` is the seed for defining polynomials with symbol "s". Examples See Also coeff roots varn horner derivat matrices rational