A degree map on unimodular rows

作者：Fasel J^*

来源：Journal of the Ramanujan Mathematical Society, 2012, 27(1): 21-40.

Let k be a field and let (A(n) -0) be the punctured affine space. We associate to any morphism g : (A(n) -0) -> (A(n) -0) an element in the Will group W (k) that we call the degree of g. We then use this degree map to give a negative answer to a question of M. V. Nori about unimodular rows.

• 出版日期2012-3