A Method for Obtaining Asymptotes of some Curves
Jovan D. Kečkić (2000)
The Teaching of Mathematics
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Displaying similar documents to “Note on the Jacobian condition and the non-proper value set”
A Method for Obtaining Asymptotes of some Curves
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Let f: ℝⁿ → ℝ be a nonconstant polynomial function. Using the information from the "curve of tangency" of f, we provide a method to determine the Łojasiewicz exponent at infinity of f. As a corollary, we give a computational criterion to decide if the Łojasiewicz exponent at infinity is finite or not. Then we obtain a formula to calculate the set of points at which the polynomial f is not proper. Moreover, a relation between the Łojasiewicz exponent at infinity of f and the problem of...
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A non-zero constant Jacobian polynomial map F=(P,Q):ℂ² → ℂ² has a polynomial inverse if the component P is a simple polynomial, i.e. its regular extension to a morphism p:X → ℙ¹ in a compactification X of ℂ² has the following property: the restriction of p to each irreducible component C of the compactification divisor D = X-ℂ² is of degree 0 or 1.
The centre symmetry set
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On the Łojasiewicz Exponent near the Fibre of a Polynomial
Grzegorz Skalski (2004)
Bulletin of the Polish Academy of Sciences. Mathematics
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The equivalence of the definitions of the Łojasiewicz exponent introduced by Ha and by Chądzyński and Krasiński is proved. Moreover we show that if the above exponents are less than -1 then they are attained at a curve meromorphic at infinity.