• Bulletin of the Korean Mathematical Society
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• v.60 no.3
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• pp.659-675
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• 2023

Let K be an algebraically closed field of characteristic 0 and let f be a non-fibered planar quadratic polynomial map of topological degree 2 defined over K. We assume further that the meromorphic extension of f on the projective plane has the unique indeterminacy point. We define the critical pod of f where f sends a critical point to another critical point. By observing the behavior of f at the critical pod, we can determine a good conjugate of f which shows its statue in GIT sense.

• East Asian mathematical journal
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• v.40 no.5
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• pp.551-557
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• 2024

This paper presents the Frobenius endomorphism on generalized Huff curve and provides the characteristic polynomial of the map. By applying the Frobenius endomorphism on generalized Huff curve, we construct a skew-Frobenius map defined on the quadratic twist of a generalized Huff curve. This map offers an efficiently computable homomorphism for performing scalar multiplication on the generalized Huff curve over a finite field. As an application, we describe the GLV method combined with the Frobenius endomorphism over the curve to speed up the scalar multiplication.

• Bulletin of the Korean Mathematical Society
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• v.48 no.4
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• pp.713-724
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• 2011

We study the dynamics of transcendental entire functions with Siegel disks whose singular values are just two points. One of the two singular values is not only a superattracting fixed point with multiplicity more than two but also an asymptotic value. Another one is a critical value with free dynamics under iterations. We prove that if the multiplicity of the superattracting fixed point is large enough, then the restriction of the transcendental entire function near the Siegel point is a quadratic-like map. Therefore the Siegel disk and its boundary correspond to those of some quadratic polynomial at the level of quasiconformality. As its applications, the logarithmic lift of the above transcendental entire function has a wandering domain whose shape looks like a Siegel disk of a quadratic polynomial.