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We prove that the mathematical framework for the de Sitter top system is thede Sitter fiber bundle. In this context, the concept of soldering associatedwith a fiber bundle plays a central role. We comment on the possibility thatour formalism may be of particular interest in different contexts includingMacDowell-Mansouri theory, two time physics and oriented matroid theory.Comment: 12 pages, Latex; some improvements introduced, reference added, typos  correcte

Soldered bundle background for the de Sitter top