## Geometry & Topology

### The Extended Bloch Group and the Cheeger–Chern–Simons Class

#### Abstract

We present a formula for the full Cheeger–Chern–Simons class of the tautological flat complex vector bundle of rank $2$ over $BSL(2,ℂδ)$. This improves the formula by Dupont and Zickert [Geom. Topol. 10 (2006) 1347–1372], where the class is only computed modulo 2–torsion.

#### Article information

Source
Geom. Topol., Volume 11, Number 3 (2007), 1623-1635.

Dates
Received: 5 June 2007
Revised: 11 July 2007
Accepted: 4 July 2007
First available in Project Euclid: 20 December 2017

Permanent link to this document
https://projecteuclid.org/euclid.gt/1513799904

Digital Object Identifier
doi:10.2140/gt.2007.11.1623

Mathematical Reviews number (MathSciNet)
MR2350461

Zentralblatt MATH identifier
1201.57019

#### Citation

Goette, Sebastian; Zickert, Christian. The Extended Bloch Group and the Cheeger–Chern–Simons Class. Geom. Topol. 11 (2007), no. 3, 1623--1635. doi:10.2140/gt.2007.11.1623. https://projecteuclid.org/euclid.gt/1513799904

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