Indecomposable continuum
(重定向自Decomposable continuum)

In point-set topology, an indecomposable continuum is a continuum that is not the union of any two of its proper subcontinua. The pseudo-arc is an example of a hereditarily indecomposable continuum. L. E. J.Brouwer (1910) discovered the first indecomposable continuum.