Mathematics – Number Theory
Scientific paper
2002-09-10
The Quarterly Journal of Mathematics, 55 (2004), no. 2, 203--206.
Mathematics
Number Theory
Scientific paper
We give a detailed proof of Theorem 1.15 from a well-known paper "Primitive normal bases for finite fields" by H.W. Lenstra Jr. and R.J. Schoof. We are not aware of any other proofs. Let $L/K$ be a finite-dimensional Galois field extension and $B$ the set of all normal bases of this extension. Theorem 1.15 describes the group of all $\gamma$ in the multiplicative group of $L$ such that $\gamma B = B$.
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