Finite extension of a finite field

From: sanchopancho80@xxxxxx
Date: Fri, 15 Aug 2008 08:44:00 -0700 (PDT)

Hello,

I've seen somebody writing F_p[a^(1/p)] with a in the finite field
F_p. What does this mean? More precisely: What does a^(1/p) mean?

Thanks,
S.
.

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