Mathematics – Algebraic Geometry
Scientific paper
2007-10-17
Mathematics
Algebraic Geometry
21 pages, LaTex
Scientific paper
The goal of this paper is to present a modified version (GML) of ML invariant which should take into account rulings over a projective base and allow further stratification of smooth affine rational surfaces. We provide a non-trivial example where GML invariant is computed for a smooth affine rational surface admitting no C-actions. We apply GML invariant to computation of ML invariant of some threefolds.
Bandman Tatiana
Makar-Limanov Leonid
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