Solving Degenerate Sparse Polynomial Systems Faster

Abstract. Consider a system F of n polynomial equations in n unknowns, over an algebraically closed field of arbitrary characteristic. We present a fast method to find a point in every irreducible component of the zero set Z of F. Our techniques allow us to sharpen and lower prior complexity bounds for this problem by fully taking into account the monomial term structure. As a corollary of our development we also obtain new explicit formulae for the exact number of isolated roots of F and the intersection multiplicity of the positivedimensional part of Z. Finally, we present a combinatorial construction of non-degenerate polynomial systems, with specified monomial term structure and maximally many isolated roots, which may be of independent interest.

• Type: Journal
• Year: 1998
• Where: CORR
• Authors: J. Maurice Rojas
• Keywords: Arbitrary Characteristic, CORR 1998, Education, Monomial Term Structure, Polynomial Equations