We show that the D=5 dilaton-axion gravity compactified on a 2-torus possesses the SL(4,R)/SO(4) matrix formulation. It is used for construction of the SO(2,2)-invariant BPS solution depended on the one harmonic function.
Cite
@article{arxiv.hep-th/9712200,
title = {BPS Solutions in D=5 Dilaton-Axion Gravity},
author = {Oleg Kechkin and Maria Yurova},
journal= {arXiv preprint arXiv:hep-th/9712200},
year = {2009}
}