6 papers
Exotic bialgebras : non-deformation quantum groups
D. Arnaudon, A. Chakrabarti, V. K. Dobrev +1
In the classification of solutions of the Yang--Baxter equation, there are solutions that are not deformations of the trivial solution (essentially the identity). We consider the a…
Non-factorisable metrics and Gauss--Bonnet terms in higher dimensions
B. Abdesselam, A. Chakrabarti, J. Rizos +1
An iterative construction of higher order Einstein tensors for a maximally Gauss-Bonnet extended gravitational Lagrangian was introduced in a previous paper. Here the formalism is…
Antisymmetrised 2p-forms generalising curvature 2-forms II: a p-hierarchy of Reissner-Nordstrom type metrics in dimensions d>2p+1
A. Chakrabarti, D. H. Tchrakian
The p-hierarchy of Schwarzschild type metrics obtained in a preceing paper is generalised here to a corresponding Reissner-Nordstrom (RN) type hierarchy in the presence of a point…
Antisymmetrised 2p-forms generalising curvature 2-forms and a corresponding p-hierarchy of Schwarzschild type metrics in dimensions d>2p+1
A. Chakrabarti, D. H. Tchrakian
Starting with the curvature 2-form a recursive construction of totally antisymmetrised 2p-forms is introduced, to which we refer as p-Riemann tensors. Contraction of indices permit…
Nonselfdual solutions for gauge fields in Schwarzschild and deSitter backgrounds for dimension
A. Chakrabarti
A particularly simple class of nonselfdual solutions are obtained for gauge fields in Schwarzschild and deSitter backgrounds. For Lorentz signature these have finite energy and fin…
and Contraction
Amitabha Chakrabarti
Representations of are constructed explicitly on the Chevalley basis for all , generic and root of unity. Matrix elements of the generators are obtained for all repr…