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RADICAL EXTENSIONS AND CROSSED HOMOMORPHISMS
(2001)
If Q./F is a Galois extension with Galois group G and /x(fi) denotes the group of roots of unity in Q, we use the group Z1{G,fi(Q)) of crossed homomorphisms to study radical extensions inside Q. Furthermore, we characterise ...
International Journal of Pure and Applied Mathematics
(2008)
I.M. Isaacs has proven a very interesting theorem concerning solvability of polynomials by real radicals. His result deals with an irreducible polynomial over the field of rational numbers which has a real radical element ...