“…Furthermore, the function tends to infinity when γ → 0, hence the minimum value Γ m,k is indeed attained for some 0 < γ m,k < 1 (one can show that there is a unique 0 < γ m,k < 1 where the minimum is attained, but this is not necessary for our purposes). Tao's slice rank method [35], together with the arguments from Blasiak et al [8], gives the following upper bound for the size of k-colored sum-free sets in Z n m for prime powers m. For the reader's convenience, we give a proof of Theorem 1.2 in Section 9 (see also [26,Theorem 4], which is a very similar theorem). Theorem 1.2.…”