The Lie algebra of type G2 is rational over its quotient by the adjoint action |
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Authors: | Dave Anderson Mathieu Florence Zinovy Reichstein |
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Institution: | 1. Instituto Nacional de Matemática Pura e Aplicada, Rio de Janeiro, RJ 22460-320, Brazil;2. Institut de mathématiques de Jussieu, Université Paris-6, 4, place Jussieu, 75005 Paris, France;3. Department of Mathematics, University of British Columbia, BC V6T 1Z2, Canada |
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Abstract: | Let G be a split simple group of type over a field k, and let be its Lie algebra. Answering a question of J.-L. Colliot-Thélène, B. Kunyavski?, V.L. Popov, and Z. Reichstein, we show that the function field is generated by algebraically independent elements over the field of adjoint invariants . |
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