For a sequence p$1,$ p$2,$ p$3,...$ in a metric space $($E$,$ d$),$ we say that q$1,$ q$2,$ q$3,...$ is a

rearrangement of p$1,$ p$2,$ p$3,...$ if there exists some bijection $\backslash$sigma : N $->$ N such that q$\backslash$sigma $($i$)=$ pi

for all i in N$.$