Answers are grounded in this paper and cite their sources.
The SU(4) symmetric version of N=4, d=4 Poincare supergravity is constructed geometrically. The underlying gauge algebra is a synthesis of a modified orthosymplectic algebra and the SU(1, 1)/U(1) sigma -model structure of the scalar fields. The author uses the group manifold approach to gauge this algebra.
No takes yet. Share an insight, caveat, or question.
R. E. C. PERRET (1988) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: