Polynomials whose roots and critical points are integers

Details Polynomials whose roots and critical points are integers Polynomials whose roots and critical points are integers

2004-07-14

arxiv.org/abs/math/0407256v1

Mathematics

Number Theory

24 pages,submitted to the American Mathematical Monthly on July 23, 2003, MS #03-491, rejected on July 8, 2004, as "Too long",

Scientific paper

Polynomials whose coefficients, roots, and critical points lie in the ring of rational integers are called nice polynomials. In this paper, we present a general method for investigating such polynomials. We extend our results from the ring of rational integers to rings of algebraic integers that are unique factorization domains, with special interest in the ring of Gaussian integers. We apply our method to establish strong properties of nice polynomials whose degree is a prime power. We present a considerable reduction of the system of equations for nice polynomials of arbitrary degree with three roots. We establish properties of nice antisymmetric polynomials, and properties of the averages of the roots of the derivatives of nice polynomials. Finally, we present new examples of nice polynomials obtained with the help of a computer, after a considerable simplification of the computation by our method.

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