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math.GR2013★ 17 cited
The tame automorphism group of an affine quadric threefold acting on a square complex
Cinzia Bisi, Jean-Philippe Furter, Stéphane Lamy
We study the group Tame(SL) of tame automorphisms of a smooth affine 3-dimensional quadric, which we can view as the underlying variety of SL(2,). We construct a sq…
math.AG2013★ 1 cited
On the genus of birational maps between 3-folds
Stéphane Lamy
In this note we present two equivalent definitions for the genus of a birational map X --> Y between smooth complex projective 3-folds. The first one is the definition introduced i…