The classification of almost simple $\tfrac{3}{2}$-transitive groups

The Classification of the Epimorphisms from the Artin-Tits groups of type $A(\widetilde{A}_{n})$ to $W(\widetilde{A}_{n})$

The classification of torsion endo-trivial modules

The classification theorem for groups of homeomorphisms of the line. Nonamenability of Thompson's group $F$

The classifications of countably-based profinite abelian groups

The co-Hopfian property of surface braid groups

The co-Hopfian property of the Johnson kernel and the Torelli group

The coarse classification of countable abelian groups

The cohomology with local coefficients of compact hyperbolic manifolds - long version

The combinatorial cost

The Combinatorial Topology of Groups

The complex Lorentzian Leech lattice and the bimonster

The complex of partial bases for F_n and finite generation of the Torelli subgroup of Aut(F_n)

The computation of the cohomology rings of all groups of order 128

The computational complexity of recognising embeddings in finitely presented groups

The congruence kernel of an arithmetic lattice in a rank one algebraic group over a local field

The congruence subgroup problem

The congruence subgroup problem for branch groups

The congruence subgroup property for $Aut F_2$: A group-theoretic proof of Asada's theorem

The conjugacy and isomorphism problems for combable groups