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 , we give a mapping class whose dilatation on an invariant subsurface is the golden ratio.
math.GT2018
On the volume and the Chern-Simons invariant for the hyperbolic alternating knot orbifolds
Ji-Young Ham, Joongul Lee
We extend the Neumann's methods and give the explicit formulae for the volume and the Chern-Simons invariant for hyperbolic alternating knot orbifolds.