(With I. Leader and D. Strauss) **Pairwise sums in colourings of the reals**
(to appear in * Abh. Math. Sem. Univ. Hamburg*)

** Recent results on partition regularity of infinite matrices**
(to appear in *Connections in Discrete Mathematics*, Cambridge
University Press)

(With D. Strauss)
**Infinite compact sets of idempotents in beta S** (to appear in
*Semigroup Forum*)

(With D. Strauss and L. Zamboni)
**Recurrence in the dynamical system (X,(T_s)_{s in S})
and ideals of beta S** (to appear in *Indagationes Mathematicae*)

(With D. Strauss)
**Long increasing chains of idempotents in beta G** (to appear in *Fund. Math.*)

(With K. Pleasant)
**Preserving integer images of matrices** (to appear in *Integers*)

(With D. Strauss)
** Image partition regularity of matrices over commutative semigroups**

** Research of Wis Comfort on ultrafilters and the Stone-Cech
compactification**