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Graded P-Polar Rings And The Homology Of ωNσNx
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).ORCID iD: 0000-0002-2722-6048
2025 (English)In: Homology, Homotopy and Applications, ISSN 1532-0073, E-ISSN 1532-0081, Vol. 27, no 1, p. 355-382Article in journal (Refereed) Published
Abstract [en]

As an extension of previous ungraded work, we define a graded p-polar ring to be an analog of a graded commutative ring where multiplication is only allowed on p-tuples (instead of pairs) of elements of equal degree. We show that the free affine p-adic group scheme functor, as well as the free formal group functor, defined on k-algebras for a perfect field k of characteristic p, factors through p-polar k-algebras. It follows that the same is true for any affine p-adic or formal group functor, in particular for the functor of p-typical Witt vectors. As an application, we show that the homology of the free En-algebra H∗(ΩnΣnX; Fp), as a Hopf algebra, only depends on the p-polar structure of H∗(X; Fp) in a functorial way.

Place, publisher, year, edition, pages
International Press of Boston , 2025. Vol. 27, no 1, p. 355-382
Keywords [en]
affine group scheme, Dieudonné theory, Dyer–Lashof operation, formal group, iterated loop space, p-polar ring, Witt vectors
National Category
Algebra and Logic
Identifiers
URN: urn:nbn:se:kth:diva-364441DOI: 10.4310/HHA.2025.v27.n1.a18Scopus ID: 2-s2.0-105007288044OAI: oai:DiVA.org:kth-364441DiVA, id: diva2:1968257
Note

QC 20250617

Available from: 2025-06-12 Created: 2025-06-12 Last updated: 2025-06-17Bibliographically approved

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Bauer, Tilman

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