activity
20122026
most citedThe minimal volume orientable hyperbolic 3-manifold with 4 cusps

9 citations · 11 across the 7 of their papers we have counts for

collaborators

7 papers

math.GT2026

On Isotopies and hyperbolicity of weaves

Ken'ichi Yoshida

A weave is a type of textile that consists of vertical and horizontal threads, and typically it has a periodic structure. In this paper, we regard a weave as a link in the thickene…

math.GT2022

Holed cone structures on 3-manifolds

Ken'ichi Yoshida

We introduce holed cone structures on 3-manifolds to generalize cone structures. In the same way as a cone structure, a holed cone structure induces the holonomy representation. We…

math.GT2019

Degeneration of 3-dimensional hyperbolic cone structures with decreasing cone angles

Ken'ichi Yoshida

For 3-dimensional hyperbolic cone structures with cone angles , local rigidity is known for , but global rigidity is known only for . The proof…

math.GT2019

Quotient topology on the set of commensurability classes of hyperbolic 3-manifolds

Ken'ichi Yoshida

We investigate relation between Dehn fillings and commensurability of hyperbolic 3-manifolds. The set consisting of the commensurability classes of hyperbolic 3-manifolds admits th…

math.GT2017★ 2 cited

Unions of 3-punctured spheres in hyperbolic 3-manifolds

Ken'ichi Yoshida

We classify the topological types for the unions of the totally geodesic 3-punctured spheres in orientable hyperbolic 3-manifolds. General types of the unions appear in various hyp…

math.GT2015

Stable presentation length of 3-manifold groups

Ken'ichi Yoshida

We introduce the stable presentation length of a finitely presented group. The stable presentation length of the fundamental group of a 3-manifold can be considered as an analogue…

math.GT2012★ 9 cited

The minimal volume orientable hyperbolic 3-manifold with 4 cusps

Ken'ichi Yoshida

We prove that the 8^4_2 link complement is the minimal volume orientable hyperbolic manifold with 4 cusps. Its volume is twice of the volume V_8 of the ideal regular octahedron, i.…