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Results tagged with projective-modules
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user 40412
For questions about projective modules over a ring and projective objects in related categories.
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Action of GL(2,O_k) on 1d subspaces of (O_k)^2
Let $\mathcal{O}_k$ be the ring of integers in an algebraic number field $k$. Let $M$ be a rank $1$ projective module over $\mathcal{O}_k$ (in other words, $M$ is a projective module such that $k \ot …
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