Integrable Yang-Mills-Higgs Equations in 3-Dimensional De Sitter   Space-Time
  This paper describes an integrable Yang-Mills-Higgs system on (2+1)-dimensional de Sitter space-time. It is the curved-space-time analogue of the Bogomolnyi equations for monopoles on R^3. A number of solutions, of various types, are constructed. 
V Kotecha and R S Ward