Sang-hyun Kim

activity

20122026

most citedAlgebraic Structure of Diffeomorphism Groups of One-Manifolds

2 citations · 2 across the 9 of their papers we have counts for

collaborators

Showing 2020Show all

2 papers · 1 filter

math.GR2020

Direct products, overlapping actions, and critical regularity

Sang-hyun Kim, Thomas Koberda, Cristóbal Rivas

We address the problem of computing the critical regularity of groups of homeomorphisms of the interval. Our main result is that if $H$ and $K$ are two non-solvable groups then a f…

math.GT2020

Shapes of hyperbolic triangles and once-punctured torus groups

Sang-hyun Kim, Thomas Koberda, Jaejeong Lee +3

Let $Δ$ be a hyperbolic triangle with a fixed area $φ$ . We prove that for all but countably many $φ$ , generic choices of $Δ$ have the property that the group generated by the $π$ --…