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- W1569644832 abstract "Given a system of $n+1$ generic Laurent polynomials, for $i ,=, 1, ldots, n+1$, $$eqlabel(InputSystem) f_i(x) quad = quad sum_{qin A_i} c_{iq} ,x^q; qquad q ,=, (q_1,ldots,q_n); qquad x^q ,=, x_1^{q_1}x_2^{q_2}cdots x_n^{q_n}; eqno(InputSystem) $$ with (finite) support sets $A_i subset L$, where $L$ is some affine lattice isomorphic to $Z^n$; we consider algorithms for the {it Newton resultant} $R(f_1,f_2, ldots, f_{n+1})$. This is the unique (up to sign) irreducible polynomial with coefficients in $Z$ and monomials in the $c_{iq}$ which determines whether or not system~(InputSystem) has common roots in the {it algebraic torus} $(C-{0})^n$. The resultant depends only on the {it Newton polytopes} $N_i ,:=, conv(A_i) subset R^n$ of the sets $A_i$. Our terminology emphasizes the dependence on the combinatorics of the Newton polytopes. The algebraic torus is the natural setting for us because we are interested in the properties of systems of polynomials which are invariant under symmetries of the affine lattice $L$, and translation by $qin L$ corresponds to multiplication by $x^q$ at the level of polynomials. Since $x^q$ may have negative exponents, we restrict to points none of whose coordinates are zero." @default.
- W1569644832 created "2016-06-24" @default.
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- W1569644832 date "1993-10-01" @default.
- W1569644832 modified "2023-09-26" @default.
- W1569644832 title "An Algorithm for the Newton Resultant" @default.
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