A homology lens space is a
smooth closed 3-manifold M3 with Hk(M3) = Hk(L(p,1)) for all k (p some
nonnegative integer). When p = 1 M3 is a homology 3-sphere. It is an open question
which of these homology lens spaces bound rational homology balls and of special
interest which homology 3-spheres bound contractible manifolds. In this note we
answer this question for certain Seifert fibre spaces, each with three exceptional
fibres.