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Reference request: The Steenrod squares generate all stable cohomology operations

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362
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Group homomorphism induces cohomology homomorphism

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#algebraic-topology #homology-cohomology #homological-algebra #cohomology-operations
354
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Why is the Bockstein morphism a derivation?

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#homology-cohomology #homological-algebra #group-cohomology #cohomology-operations
77
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Is it possible to find a torsion-free space with non-trivial $\operatorname{Sq}^{2^n}$

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180
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differential in AHSS for spin cobordism

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Calculate the Wu class from the Stiefel-Whitney class

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#algebraic-topology #characteristic-classes #cohomology-operations
243
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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.

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#algebraic-topology #characteristic-classes #cohomology-operations
129
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Which integral Steifel-Whitney classes are universally $0$?

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#algebraic-topology #characteristic-classes #classifying-spaces #cohomology-operations
60
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On how to compute $H_*(\Omega^2 S^{n+2}, \mathbb Z/2)$ and its Steenrod operations

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#homology-cohomology #spectral-sequences #loop-spaces #cohomology-operations
149
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Some clarifications about the Secondary Cohomology Operation associated to $Sq^2\circ Sq^2=0$

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#algebraic-topology #homology-cohomology #spectral-sequences #cohomology-operations
519
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Closed manifolds with isomorphic cohomology rings, but different cohomology modules over the Steenrod algebra

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#algebraic-topology #manifolds #examples-counterexamples #homology-cohomology #cohomology-operations
461
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Applications of Steenrod Squares

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#algebraic-topology #manifolds #geometric-topology #cohomology-operations
629
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Intuition behind cohomology operations

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#algebraic-topology #soft-question #homology-cohomology #intuition #cohomology-operations
69
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Steenrod squares in a Puppe sequence

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#algebraic-topology #homotopy-theory #fibration #cohomology-operations
707
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Reference for secondary cohomology operations

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