Ursula Hamenstādt

activity

20052026

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math.DG2024

Negatively curved Einstein metrics on Gromov-Thurston manifolds

Ursula Hamenstädt, Frieder Jäckel

For every $n \geq 4$ we construct infinitely many mutually not homotopic closed manifolds of dimension $n$ which admit a negatively curved Einstein metric but no locally symmetric m…

math.DG2024

Hitchin grafting representations II: Dynamics

Pierre-Louis Blayac, Ursula Hamenstädt, Théo Marty +1

The Hitchin component of the character variety of representations of a surface group $π_{1} (S)$ into $PSL_{d} (R)$ for some $d \geq 3$ can be equipped with a pressure…

math.GT2024

Submanifold projections and hyperbolicity in $Out (F_{n})$

Ursula Hamenstädt, Sebastian Hensel

The free splitting graph of a free group $F_{n}$ with $n \geq 2$ generators is a hyperbolic $Out (F_{n})$ -graph which has a geometric realization as a sphere graph in the connected…

Negatively curved Einstein metrics on Gromov-Thurston manifolds

Hitchin grafting representations II: Dynamics

Submanifold projections and hyperbolicity in Out(Fn​)

Submanifold projections and hyperbolicity in $Out (F_{n})$