Towards Ivanov's meta-conjecture for geodesic currents

Abstract

Given a closed, orientable surface $S$ of negative Euler characteristic, we study two automorphism groups: $Aut(\mathcal{C})$ and $Aut(\mathcal{ML})$, groups of homeomorphisms that preserve the intersection form in the space $\mathcal{C}$ of geodesic currents and the space $\mathcal{ML}$ of measured laminations. We prove that except in a few special cases, $Aut(\mathcal{ML})$ is isomorphic to the extended mapping class group. This theorem is a special case of \textit{Ivanov's meta-conjecture}. We investigate this question for $Aut(\mathcal{C})$. To demonstrate the difficulty in proving Ivanov's conjecture for $Aut(\mathcal{C})$, we construct infinite family of pairs of closed curves that have the simple same marked length spectra and self intersection number.