Successive minima of projective toric varieties

Details Successive minima of projective toric varieties Successive minima of projective toric varieties

2002-09-16

arxiv.org/abs/math/0209195v2

Mathematics

Number Theory

Revised version. In French, 25 pp

Scientific paper

We compute the successive minima of the projective toric variety $X_\cA$ associated to a finite set $ \cA \subset \Z^n$. As a consequence of this computation and of the results of S.-W. Zhang on the distribution of small points, we derive estimates for the height of the subvariety $X_\cA$ and of the $\cA$-resultant. These estimates allow us to obtain an arithmetic analogue of the Bezout-Kushnirenko's theorem concerning the number of solutions of a system of polynomial equations. As an application of this result, we improve the known estimates for the height of the polynomials in the sparse Nullstellensatz.

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