Retractability of set theoretic solutions of the Yang-Baxter equation

Retracts of vertex sets of trees and the almost stability theorem

Retrieving information about a group from its character degrees or its class sizes

Reversibility and Banach Algebras

Reversible maps and composites of involutions in groups of piecewise linear homeomorphisms of the real line

Rewriting Systems and Embedding of monoids in groups

Rewriting Systems and Geometric 3-Manifolds

Rewriting Systems in Alternating Knot groups with the Dehn presentation

Rewriting the check of 8-rewritability for $A_5$

Right 4-Engel elements of a group

Right division in groups, Dedekind-Frobenius group matrices, and Ward quasigroups

Right orderable residually finite p-groups and a Kourovka notebook problem

Right product quasigroups and loops

Rigid abelian groups and the probabilistic method

Rigid and super rigid quasigroups

Rigidity and relative hyperbolicity of real hyperbolic hyperplane complements

Rigidity of amalgamated free products in measure equivalence

Rigidity of graph products of abelian groups

Rigidity of graph products of groups

Rigidity of Right-Angled Coxeter Groups