Stable Postnikov data of Picard 2–categories
نویسندگان
چکیده
منابع مشابه
Picard Groups of Topologically Stable Poisson Structures
We compute the group of Morita self-equivalences (the Picard group) of a Poisson structure on an orientable surface, under the assumption that the degeneracies of the Poisson tensor are linear. The answer involves mapping class groups of surfaces, i.e., groups of isotopy classes of diffeomorphisms. We also show that the Picard group of these structures coincides with the group of outer Poisson ...
متن کاملOn the Cohomology of Stable Two Stage Postnikov Systems
Introduction. Let £ = (£ , p, B, F) denote a two stage Postnikov system with stable fe-invariant. We announce results about H*(ÜE) as a Hopf algebra over the Steenrod algebra. Mod 2 cohomology is used exclusively. Unexplained notation is from [4] and [S]. 1 am grateful to D. Anderson, W. Massey, F . Peterson and H. Salomonsen for many useful remarks. We make the following assumptions on £, in a...
متن کاملA Randomness Test for Stable Data
In this paper, we propose a new method for checking randomness of non-Gaussian stable data based on a characterization result. This method is more sensitive with respect to non-random data compared to the well-known non-parametric randomness tests.
متن کاملPostnikov Identities and Seo’s Formulas
Seo and others have generalized an identity of Postnikov by finding expressions for the generating function for the number of proper vertices in certain families of rooted trees and forests. We describe an approach to these results that involves a straightforward inductive argument and a version of the Lambert-Rothe identities.
متن کاملPostnikov Extensions of Ring Spectra
We give a functorial construction of k-invariants for ring spectra, and use these to classify extensions in the Postnikov tower of a ring spectrum.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Algebraic & Geometric Topology
سال: 2017
ISSN: 1472-2739,1472-2747
DOI: 10.2140/agt.2017.17.2763