Skolem's solution to a problem of Frobenius (Q1171080)

This is a detailed survey of well known solutions and, particularly, of Skolem's solution to the following problem of Frobenius: Let \(a_1,\ldots,a_k\) be relatively prime positive integers. Does there exist an integer \(G=G(a_1,\ldots,a_k)\) such that every positive integer \(n>G\) is representable over the nonnegative integers by the form \(a_1x_1+\ldots +a_kx_k\).