List questions from cohomology-operations

Published on 28 Jun 2018 - 10:02

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Group homomorphism induces cohomology homomorphism

Published on 08 Feb 2019 - 14:05

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Why is the Bockstein morphism a derivation?

Published on 23 Feb 2019 - 12:14

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Is it possible to find a torsion-free space with non-trivial $\operatorname{Sq}^{2^n}$

Published on 18 May 2019 - 11:52

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differential in AHSS for spin cobordism

Published on 18 May 2014 - 4:24

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Calculate the Wu class from the Stiefel-Whitney class

Published on 18 May 2014 - 21:09

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The smallest $n> 0$ with the nonzero $n$th Stiefel-Whitney class is a power of 2 when total Stiefel-Whitney class is not trivial.

Published on 22 Nov 2014 - 8:16

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Which integral Steifel-Whitney classes are universally $0$?

Published on 27 May 2020 - 16:13

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On how to compute $H_*(\Omega^2 S^{n+2}, \mathbb Z/2)$ and its Steenrod operations

Published on 02 Jun 2020 - 10:36

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Some clarifications about the Secondary Cohomology Operation associated to $Sq^2\circ Sq^2=0$

Published on 01 Nov 2016 - 14:28

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Closed manifolds with isomorphic cohomology rings, but different cohomology modules over the Steenrod algebra

Published on 31 Dec 2016 - 14:28

457

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Applications of Steenrod Squares

Published on 15 Mar 2017 - 21:03

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Intuition behind cohomology operations

Published on 05 Apr 2017 - 6:58

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Steenrod squares in a Puppe sequence

Published on 26 Jun 2023 - 8:19

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Reference for secondary cohomology operations

Published on 07 Jan 2015 - 21:56

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Reference request: The Steenrod squares generate all stable cohomology operations

Group homomorphism induces cohomology homomorphism

Why is the Bockstein morphism a derivation?

Is it possible to find a torsion-free space with non-trivial $\operatorname{Sq}^{2^n}$

differential in AHSS for spin cobordism

Calculate the Wu class from the Stiefel-Whitney class

The smallest $n> 0$ with the nonzero $n$th Stiefel-Whitney class is a power of 2 when total Stiefel-Whitney class is not trivial.

Which integral Steifel-Whitney classes are universally $0$?

On how to compute $H_*(\Omega^2 S^{n+2}, \mathbb Z/2)$ and its Steenrod operations

Some clarifications about the Secondary Cohomology Operation associated to $Sq^2\circ Sq^2=0$

Closed manifolds with isomorphic cohomology rings, but different cohomology modules over the Steenrod algebra

Applications of Steenrod Squares

Intuition behind cohomology operations

Steenrod squares in a Puppe sequence

Reference for secondary cohomology operations

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