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Top Questions

Is there a version of algebraic de Rham cohomology that can be used to calculate torsion classes?

ag.algebraic-geometry at.algebraic-topology etale-cohomology p-adic-hodge-theory asked Jan 9, 2020 at 17:39

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Is the $\mathbb A^1$ homotopy type of a punctured curve independent of the choice of puncture?

ag.algebraic-geometry homotopy-theory motivic-homotopy asked Jan 16, 2020 at 16:59

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What is this analog of $\mathbb A^1$ / proper homotopy theory?

homotopy-theory asked Nov 30, 2018 at 22:54

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The conservativity conjecture for motives

ag.algebraic-geometry homotopy-theory asked Mar 14, 2022 at 16:31

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Is an open subset of a cofibration a cofibration?

at.algebraic-topology gn.general-topology homotopy-theory model-categories asked Feb 12, 2021 at 17:58

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Top Answers

Recovering an abelian category from the Ext of its simple objects

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Is pure mathematics useful outside of mathematics itself?

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What is the cotangent complex good for?

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Could a motivic spectrum have a "zeta function"?

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Why do we study complex orientable cohomology theories

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Involution map, and induced morphism in K-theory

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