摘要
We describe all degenerations of the variety ■3 of Jordan algebras of dimension three over C.In particular,we describe all irreducible components in ■3.For every n we define an n-dimensional rigid“marginal”Jordan algebra of level one.Moreover,we discuss marginal algebras in associative,alternative,left alternative,non-commutative Jordan,Leibniz and anticommutative cases.
基金
supported by FAPESP(16/16445-0,18/15712-0),RFBR(18-31-00001)
the President's Program Support of Young Russian Scientists(grant MK-2262.2019.1).