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pro vyhledávání: '"Mangioni, Giorgio"'
Autor:
Mangioni, Giorgio
We prove that the mapping class group of a sphere with five punctures admits uncountably many non-equivalent, coarsely equivariant coarse median structures, falsifying a folklore belief. The same is shown for right-angled Artin groups whose defining
Externí odkaz:
http://arxiv.org/abs/2410.09232
Autor:
Mangioni, Giorgio
We provide sufficient conditions for two subgroups of a hierarchically hyperbolic group to generate an amalgamated free product over their intersection. The result applies in particular to certain geometric subgroups of mapping class groups of finite
Externí odkaz:
http://arxiv.org/abs/2409.03602
Autor:
Mangioni, Giorgio
We consider quotients of mapping class groups of orientable, finite type surfaces by subgroups whose action on the curve graph has large displacement. This class includes quotients by the normal closure of a pseudo-Anosov element, the mapping class g
Externí odkaz:
http://arxiv.org/abs/2312.00701
The combinatorial hierarchical hyperbolicity criterion is a very useful way of constructing new hierarchically hyperbolic spaces (HHSs). We show that, conversely, HHSs satisfying natural assumptions (satisfied, for example, by mapping class groups) a
Externí odkaz:
http://arxiv.org/abs/2308.16335
Autor:
Mangioni, Giorgio, Sisto, Alessandro
We study quotients of mapping class groups of punctured spheres by suitable large powers of Dehn twists, showing an analogue of Ivanov's theorem for the automorphisms of the corresponding quotients of curve graphs. Then we use this result to prove qu
Externí odkaz:
http://arxiv.org/abs/2212.11014