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EXPLICIT cocycle formulas on finite abelian groups with applications to braided linear Gr-categories and Dijkgraaf–Witten invariants

Published online by Cambridge University Press:  13 March 2019

Hua-Lin Huang
Affiliation:
School of Mathematical Sciences, Fujian Province University Key Laboratory of Computational Science, Huaqiao University, Quanzhou362021, China ([email protected])
Zheyan Wan
Affiliation:
School of Mathematical Sciences, University of Science and Technology of China, Hefei230026, China ([email protected]; [email protected])
Yu Ye
Affiliation:
School of Mathematical Sciences, University of Science and Technology of China, Hefei230026, China ([email protected]; [email protected])

Abstract

We provide explicit and unified formulas for the cocycles of all degrees on the normalized bar resolutions of finite abelian groups. This is achieved by constructing a chain map from the normalized bar resolution to a Koszul-like resolution for any given finite abelian group. With a help of the obtained cocycle formulas, we determine all the braided linear Gr-categories and compute the Dijkgraaf–Witten Invariants of the n-torus for all n.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 2019

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