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Results tagged with at.algebraic-topology
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user 12728
Homotopy theory, homological algebra, algebraic treatments of manifolds.
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Identifying the orientation bundle uniquely
A nonorientable surface $S$ is homeomorphic to the $k$-th connected sum
$\mathbb{R}P^2 \sharp \ldots \sharp \mathbb{R}P^2$.
For each nonorientable surface $S$ there exists an oriented $2$-fold cov …
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