arXiv subjects

Marat Gizatullin

Publications and source records attributed to Marat Gizatullin.

3 recordsLinked to original sources

arXiv2002

Fano's inequality is false for a simple Cremona transformation of five-dimensional projective space

A Cremona transformation of five-dimensional projective space is constructed. The degree of the transformation is 7. The inequalities of Fano are not fulfilled for this transformation.

math.AG↗

arXiv2002

Fano's inequality is also false for three-dimensional quadric

A birational transformation of three-dimensional quadric is constructed. The inequalities of fano are not fulfilled for this transformation.

math.AG↗

arXiv2002

Fano's inequality is a mistake

An example of a Cremona transformation of the tree-dimensional projective space is presented. For the transformation, the inequalities of Fano are not valid.

math.AG↗