The Frobenius automorphism on a field 
of field characteristic 
is the map 
that maps each element 
of 
to 
.
Frobenius Automorphism
This entry contributed by David Terr
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Cite this as:
Weisstein, Eric W., with contributions by David Terr. "Frobenius Automorphism." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/FrobeniusAutomorphism.html