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Tagged with cohomology-operations steenrod-algebra
3 questions
19
votes
1
answer
1k
views
Steenrod squares as power operations vs. as cohomology operations
There are already several excellent questions and answers on MO regarding Steenrod squares, understanding them in various ways and relating them to power operations and I think I get this. Still, I am ...
- 18.4k
5
votes
1
answer
387
views
Ádem relations for the Steenrod and the Dyer–Lashof algebra
In this paper by Nondas Kechagias, the Steenrod algebra and the Dyer–Lashof algebra are compared. The rough difference ist:
The Steenrod algebra arises by dividing out the “cohomological” Ádem ...
- 3,526
17
votes
2
answers
771
views
Massey products in the Steenrod algebra
When building $kU/2$ via its Postnikov tower, there are some interesting Massey products that show up in the Steenrod algebra, and I'd like to understand them. I bet these appear somewhere in the ...
- 52.7k