Maximally Sparse Polynomials have Solid Amoebas

Details Maximally Sparse Polynomials have Solid Amoebas Maximally Sparse Polynomials have Solid Amoebas

2007-04-17

arxiv.org/abs/0704.2216v2

Mathematics

Algebraic Geometry

29 pages, 26 figures

Scientific paper

Let $f$ be an ordinary polynomial in $\mathbb{C}[z_1,..., z_n]$ with no negative exponents and with no factor of the form $z_1^{\alpha_1}... z_n^{\alpha_n}$ where $\alpha_i$ are non zero natural integer. If we assume in addicting that $f$ is maximally sparse polynomial (that its support is equal to the set of vertices of its Newton polytope), then a complement component of the amoeba $\mathscr{A}_f$ in $\mathbb{R}^n$ of the algebraic hypersurface $V_f\subset (\mathbb{C}^*)^n$ defined by $f$, has order lying in the support of $f$, which means that $\mathscr{A}_f$ is solid. This gives an affirmative answer to Passare and Rullg\aa rd question in [PR2-01].

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