Some Reductions on Jacobian Problem in Two Variables

Details Some Reductions on Jacobian Problem in Two Variables Some Reductions on Jacobian Problem in Two Variables

2002-09-19

arxiv.org/abs/math/0209254v1

J. Pure Appl. Algebra, 188 (2004), no. 1-3, 305--319.

Mathematics

Algebraic Geometry

Scientific paper

Let $f=(f_1, f_2)$ be a regular sequence of affine curves in $\bC^2$. Under some reduction conditions achieved by composing with some polynomial automorphisms of $\bC^2$, we show that the intersection number of curves $(f_i)$ in $\bC^2$ equals to the coefficient of the leading term $x^{n-1}$ in $g_2$, where $n=\deg f_i$ $(i=1, 2)$ and $(g_1, g_2)$ is the unique solution of the equation $y{\mathcal J}(f)=g_1f_1+g_2f_2$ with $\deg g_i\leq n-1$. So the well-known Jacobian problem is reduced to solving the equation above. Furthermore, by using the result above, we show that the Jacobian problem can also be reduced to a special family of polynomial maps.

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