The topics covered derive from classic works of nineteenth-century mathematics, among them Galoisโs theory of algebraic equations, Gaussโs theory of binary quadratic forms, and Abelโs theorems about integrals of rational differentials on algebraic curves. Other topics include Newton's diagram, the fundamental theorem of algebra, factorization of polynomials over constructive fields, and the spectral theorem for symmetric matrices, all treated using constructive methods in the spirit of Kronecker.
In this second edition, the essays of the first edition are augmented with newessays that give deeper and more complete accounts of Galoisโs theory, points on an algebraic curve, and Abelโs theorem. Readers will experience the full power of Galoisโs approach to solvability by radicals, learn how to construct points on an algebraic curve using Newtonโs diagram, and appreciate the amazing ideas introduced by Abel in his 1826 Paris memoir on transcendental functions.Mathematical maturity is required of the reader, and some prior knowledge of Galois theory is helpful. But experience with constructive mathematics is not necessary; readers should simply be willing to set aside abstract notions of infinity and explore deep mathematics via explicit constructions.
Harold M. Edwards [1936โ2020] was Professor Emeritus of Mathematics at New York University. His research interests lay in number theory, algebra, and the history and philosophy of mathematics. He authored numerous books, including Riemannโs Zeta Function (1974, 2001) and Fermatโs Last Theorem (1977), for which he received the Leroy P. Steele Prize for mathematical exposition in 1980.
David A. Cox (Contributing Author) is Professor Emeritus of Mathematics in the Department of Mathematics and Statistics of Amherst College. He received the Leroy P. Steele Prize for mathematical exposition in 2016 for his book Ideals, Varieties, and Algorithms, with John Little and Donal OโShea.