Indecomposability or indecomposable may refer to any of several subjects in mathematics:
Indecomposable module, in algebra Indecomposable distribution, in probability Indecomposable continuum, in topology Indecomposability (intuitionistic logic), a principle in constructive analysis and in computable analysis Indecomposability of a polynomial in polynomial decomposition A property of certain ordinals; see additively indecomposable ordinal