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Publications Influence

Classical 6j-symbols and the tetrahedron

- Justin Roberts
- Mathematics, Physics
- 15 December 1998

A classical 6j-symbol is a real number which can be associated to a labelling of the six edges of a tetrahedron by irreducible representations of SU(2). This abstract association is traditionally… Expand

124 12- PDF

Irreducibility of some quantum representations of mapping class groups

- Justin Roberts
- Mathematics
- 22 September 1999

The SU(2) TQFT representation of the mapping class group of a closed surface of genus g, at a root of unity of prime order, is shown to be irreducible. Some examples of reducible representations are… Expand

44 6- PDF

On central extensions of mapping class groups

- G. Masbaum, Justin Roberts
- Mathematics
- 1 May 1995

The mapping class group representations related to quanttttn invariants (/~ la Jones, Witten [35], Reshetikhin-Turaev [26], Lickorish [17, tS], Blanchet et aL [5~, Wenz! ~34~, T~r~ev-Wenz~ ~3~, ~nd… Expand

35 5

Release characteristics of selected carbon nanotube polymer composites

- C. Kingston, R. G. Zepp, +9 authors W. Wohlleben
- Materials Science
- 1 March 2014

Abstract Multi-walled carbon nanotubes (MWCNTs) are commonly used in polymer formulations to improve strength, conductivity, and other attributes. A developing concern is the potential for carbon… Expand

177 4

A simple proof of integrality of quantum invariants at prime roots of unity

- G. Masbaum, Justin Roberts
- Mathematics
- 1 May 1997

64 4

UNUSUAL FORMULAE FOR THE EULER CHARACTERISTIC

- Justin Roberts
- Mathematics
- 18 January 2002

Everyone knows that the Euler characteristic of a combinatorial manifold is given by the alternating sum of its numbers of simplices. It is shown that there are other linear combinations of the… Expand

6 2- PDF

Rozansky-Witten theory

- Justin Roberts
- Mathematics
- 19 December 2001

Rozansky and Witten proposed in 1996 a family of new three-dimensional topological quantum field theories, indexed by compact (or asymptotically flat) hyperkaehler manifolds. As a byproduct they… Expand

8 2- PDF

Surrendering Surinam: The Barbadian Diaspora and the Expansion of the English Sugar Frontier, 1650–75

- Justin Roberts
- Sociology
- 2016

Abstract:Before 1667, Surinam was the next major frontier for Barbadians who wanted to expand the sugar plantation complex. A proprietary colony under the control of Francis Willoughby, governor of… Expand

9 1

Kirby calculus in manifolds with boundary

- Justin Roberts
- Mathematics
- 1 March 1997

Suppose there are two framed links in a compact, connected 3-manifold (possibly with boundary, or non-orientable) such that the associated 3-manifolds obtained by surgery are homeomorphic (relative… Expand

20 1- PDF

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