Abstract
Among the simple finite-dimensional Lie algebras, only \(\mathfrak{s}\mathfrak{l}(n)\) has two finite-order automorphisms that have no common nonzero eigenvector with the eigenvalue one. It turns out that these automorphisms are inner and form a pair of generators that allow generating all of \(\mathfrak{s}\mathfrak{l}(n)\) under bracketing. It seems that Sylvester was the first to mention these generators, but he used them as generators of the associative algebra of all n×n matrices Mat(n). These generators appear in the description of elliptic solutions of the classical Yang-Baxter equation, the orthogonal decompositions of Lie algebras, ’t Hooft’s work on confinement operators in QCD, and various other instances. Here, we give an algorithm that both generates \(\mathfrak{s}\mathfrak{l}(n)\) and explicitly describes a set of defining relations. For simple (up to the center) Lie superalgebras, analogues of Sylvester generators exist only for \(\mathfrak{g}\mathfrak{l}(n|n)\). We also compute the relations for this case.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 149, No. 1, pp. 3–17, October, 2006.
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Sachse, C. Sylvester-’t Hooft generators and relations between them for \(\mathfrak{s}\mathfrak{l}(n)\) and \(\mathfrak{g}\mathfrak{l}(n|n)\) . Theor Math Phys 149, 1299–1311 (2006). https://doi.org/10.1007/s11232-006-0119-0
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DOI: https://doi.org/10.1007/s11232-006-0119-0