Approximate inverse systems of
metric compacta are introduced and studied. The bonding maps in these
systems commute only up to certain controlled values. With every such system
X= (Xa,𝜖a,paa′,A) are associated a limit space X and projections pa: X → Xa. A
compact Hausdorff space X has covering dimension dimX ≤ n if and only if it can
be obtained as the limit of an approximate inverse system of compact polyhedra of
dimension ≤ n. The analogous statement for usual inverse systems is known to be
false.