一个数论定理

摘要

宣称：任意2≤k∈N,k｜^k∏i=1 ai,其中ai∈Z,且对1≤i≤k-1,ai＋1=ai＋1，并予以四种证明．%We assert that ,任意2≤k∈N,k｜^k∏i=1 ai,where ai∈Z and ai＋1=ai＋1for1≤i≤k-1, and give four proofs four it.