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Jokes in Miles Reid’s ‘Undergraduate Algebraic Geometry’
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morphism of schemes that is closed at topological space level
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Is the universal covering of an open subset of $\mathbb{R}^n$ diffeomorphic to an open subset of $\mathbb{R}^n$ ?
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When to pick a basis?
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What is etale descent?
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Sexy vacuity …
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Line bundles with complex connection
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