Free resolutions of orbit closures for the representations associated to gradings on Lie algebras of type E6, F4 and G2Report as inadecuate



 Free resolutions of orbit closures for the representations associated to gradings on Lie algebras of type E6, F4 and G2


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The irreducible representations of complex semisimple algebraic groups with finitely many orbits are parametrized by graded simple Lie algebras. For the exceptional Lie algebras, Kraskiewicz and Weyman exhibit the Hilbert polynomials and the expected minimal free resolutions of the normalization of the orbit closures. We present an interactive method to construct explicitly these and related resolutions in Macaulay2. The method is then used in the cases of the Lie algebras of type E6, F4, and G2, to confirm the shape of the expected resolutions as well as some geometric properties of the orbit closures.



Author: Federico Galetto

Source: https://archive.org/







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