popovvl@mi.ras.ru
Submission: 2012, Dec 1
We construct counterexamples to the rationality conjecture regarding the new version of the Makar-Limanov invariant introduced in A. Liendo, G_a-actions of fiber type on affine T-varieties, J. Algebra 324 (2010), 3653--3665.
2010 Mathematics Subject Classification: 14E08, 14E07
Keywords and Phrases: algebraic group, stable rationality, field of invariants
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