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Title: On the minors of the implicitization Bezout matrix for a rational plane curve
Authors: Chionh, E.-W. 
Sederberg, T.W.
Issue Date: 2001
Citation: Chionh, E.-W., Sederberg, T.W. (2001). On the minors of the implicitization Bezout matrix for a rational plane curve. Computer Aided Geometric Design 18 (1) : 21-36. ScholarBank@NUS Repository.
Abstract: This paper investigates the first minors Mi,j of the Bezout matrix used to implicitize a degree-n plane rational curve P(t). It is shown that the degree n-1 curve Mi,j = 0 passes through all of the singular points of P(t). Furthermore, the only additional points at which Mi,j = 0 and P(t) intersect are an (i+j)-fold intersection at P(0) and a (2n-2-i-j)-fold intersection at P(∞). Thus, a polynomial whose roots are exactly the parameter values of the singular points of P(t) can be obtained by intersecting P(t) with M0,0. Previous algorithms of finding such a polynomial are less direct. We further show that Mi,j = Mk,l if i+j = k+l. The method also clarifies the applicability of inversion formulas and yields simple checks for the existence of singularities in a cubic Be´zier curve.
Source Title: Computer Aided Geometric Design
ISSN: 01678396
DOI: 10.1016/S0167-8396(00)00034-0
Appears in Collections:Staff Publications

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