If 
is an element of a field 
over the prime field 
, then the set of all rational
functions of 
with coefficients in 
is a field derived from 
by adjunction of 
.
Adjunction
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Cite this as:
Weisstein, Eric W. "Adjunction." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Adjunction.html