... to appear inAdvanced Courses in Mathematics CRM Barcelona.[9] A. Geroldinger and F. Halter-Koch, Non-Unique Factorizations. Algebraic, Combina-torial and Analytic Theory, Pure and Applied Mathematics, ... + B = {a + b | a ∈ A, b ∈ B} denotestheir sumset. The stabilizer of A is defined as Stab (A) = {g ∈ G | g + A = A} , A iscalled periodic if Stab (A) = {0}, and we set A = { a | a ∈ A} .An s-tuple ... Subsequence Sums of a Zero-sum Free Sequence IIWeidong Gao1, Yuanlin Li2, Jiangtao Peng3and Fang Sun41,3,4Center for Combinatorics, LPMC Nankai University,Tianjin, P.R. China2Department of...