The cylinder over the Koras-Russell cubic threefold has a trivial Makar-Limanov invariant
classification
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keywords
invariantcubiccylinderkoras-russellmakar-limanovthreefoldtrivialactions
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We show that the Makar-Limanov invariant of the cylinder over the Koras-Russell cubic affine threefold is trivial. This means that regular functions which are invariant under all algebraic actions of the additive group on this variety are constants.
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