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Robert Bell

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Name	Robert Bell
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How to prove the connected sum of two closed aspherical n-manfolds (n >2) is not asperical?

Braid groups acting on CAT(0)-complexes

Contracting a geodesic on a space of curvature less than 1

Reidemeister-Schreier Method for Finding Stabilizer of an Element in a Group Action

Books for hyperbolic geometry ( surfaces ) with exercises ?

Compelling evidence that two basepoints are better than one

Flat sector in a proper cocompact CAT(0) space

Injective maps $\mathbb{R}^{n} \to \mathbb{R}^{m}$

Undergraduate Probability Topics

What’s your favorite equation, formula, identity or inequality?

orders of products of permutations

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gt.geometric-topology× 3
gr.group-theory× 3
geometric-group-theory× 3
reference-request× 2
dg.differential-geometry× 2
big-list× 2
at.algebraic-topology× 2
teaching
soft-question
riemannian-geometry

permutations
mg.metric-geometry
hyperbolic-geometry
gn.general-topology
geometry
finite-groups
combinatorial-group-theor
co.combinatorics
alexandrov-geometry

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