Bivariate factorizations connecting Dickson polynomials and Galois theory

Abhyankar, Shreeram S. ; Cohen, Stephen D. ; Zieve, Michael E. (2000) Bivariate factorizations connecting Dickson polynomials and Galois theory Transactions of the American Mathematical Society, 352 (6). pp. 2871-2887. ISSN 0002-9947

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Official URL: http://www.ams.org/journals/tran/2000-352-06/S0002...

Related URL: http://dx.doi.org/10.1090/S0002-9947-00-02271-6

Abstract

In his Ph.D. Thesis of 1897, Dickson introduced certain permutation polynomials whose Galois groups are essentially the dihedral groups. These are now called Dickson polynomials of the first kind, to distinguish them from their variations introduced by Schur in 1923, which are now called Dickson polynomials of the second kind. In the last few decades there have been extensive investigations of both of these types, which are related to the classical Chebyshev polynomials. We give new bivariate factorizations involving both types of Dickson polynomials. These factorizations demonstrate certain isomorphisms between dihedral groups and orthogonal groups, and lead to the construction of explicit equations with orthogonal groups as Galois groups.

Item Type:Article
Source:Copyright of this article belongs to American Mathematical Society.
ID Code:16
Deposited On:16 Sep 2010 06:54
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