2 papers
math.GT2026
Cellular waists of hyperbolic spaces
Grigori Avramidi, Thomas Delzant
We find lower bounds on the topological complexity of fibers of PL and generic smooth maps , where is a closed hyperbolic manifold of large injec…
math.GT2026
Group rings and hyperbolic geometry
Grigori Avramidi, Thomas Delzant
For a group acting on a hyperbolic space, we set up an algorithm in the group algebra showing that ideals generated by few elements are free, where few is a function of the minimal…