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2010 | OriginalPaper | Chapter
The Algebra
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31.1.1
. From now on,
R
will be a fixed commutative ring with 1, with a given invertible element
v
. We shall regard
R
as an
A
-algebra via the ring homomorphism
$$\phi \,A \to R$$
such that
$$\phi (\upsilon ^n ) = {\rm{v}}^n $$
for all
n
$$ \in $$
Z.