On the heredity of Hun and Hungarian property

Denote byD(S) the convolution semigroup of compact-regular probability measures on a topological semigroupS. Hincin's classical decomposition theorems are extended to finite point processes on a completely regular topological space and to the convolution semigroupsD(D(G)), D(D(D(G))),... whereG is a locally compact Hausdorff group. The paper applies the Hun-Hungarian semigroup theory approach of Ruzsa and Székely; the proofs also follow this abstract setting.