In general, the creep compliances, \(S_{i j}(t)\) and the relaxation moduli, \(C_{i j}(t)\) are not related by a simple inverse relationship. Show that only when \(t \rightarrow 0\) and when \(t \rightarrow \infty\), can we say that

\[\left[C_{i j}(t)\right]=\left[S_{i j}(t)\right]^{-1}\]