Versal Deformations and Versality in Central Extensions of Jacobi's Schemes

Roger Carles, Toukaiddine Petit

Let ${Ł}_m$ be the scheme of the laws defined by the Jacobi's identities on $\K^m$ with $\K$ a field. A deformation of $\g\inŁ_m$, parametrized by a local $\K$-algebra $\A$, is a loc…