J. Ham

activity

20052020

most citedThe minimum dilatation of pseudo-Anosov 5-braids

4 citations · 4 across the 3 of their papers we have counts for

collaborators

3 papers

math.GT2020

Remarks on the Liechti-Strenner's examples having small dilatations

Ji-Young Ham, Joongul Lee

We show that the Liechti-Strenner's example for the closed nonorientable surface in \cite{LiechtiStrenner18} minimizes the dilatation within the class of pseudo-Anosov homeomorphis…

math.GT2019

Golden ratio on nonorientable surfaces

Ji-Young Ham, Joongul Lee

On each nonorientable surface of odd genus $g \geq 5$ , we give a mapping class whose dilatation on an invariant subsurface is the golden ratio.

math.GT2005★ 4 cited

The minimum dilatation of pseudo-Anosov 5-braids

Ji-Young Ham, Won Taek Song

The minimum dilatation of pseudo-Anosov 5-braids is shown to be the largest zero $λ_{5} \approx 1.72208$ of $x^{4} - x^{3} - x^{2} - x + 1$ which is attained by $σ_{1} σ_{2} σ_{3} σ_{4} σ_{1} σ_{2}$ .