14 citations · 41 across the 15 of their papers we have counts for
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math.DS2011
Ziggurats and rotation numbers
Danny Calegari, Alden Walker
We establish the existence of new rigidity and rationality phenomena in the theory of nonabelian group actions on the circle, and introduce tools to translate questions about the e…
math.GR2011
Random rigidity in the free group
Danny Calegari, Alden Walker
We prove a rigidity theorem for the geometry of the unit ball in random subspaces of the scl norm in B_1^H of a free group. In a free group F of rank k, a random word w of length n…
math.GR2011★ 8 cited
Isometric endomorphisms of free groups
Danny Calegari, Alden Walker
An arbitrary homomorphism between groups is nonincreasing for stable commutator length, and there are infinitely many (injective) homomorphisms between free groups which strictly d…