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Results tagged with derived-categories
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user 18850
For questions about the derived categories of various abelian categories and questions regarding the derived category construction itself.
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what is the universal cover of GL(2,R)?
For the sake of completeness here is an explicit proof. Let $m\in GL_{2}(\mathbb{R})^{+}$, then $m\rightarrow \frac{m}{\det(m)}$ maps it to an element in $SL_{2}(\mathbb{R})$. And we know $SL_{2}(\mat …
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