Yingbo, Zhang, The Modules in any Component of the AR-quiver of a Wild Hereditary Artin Algebra are Uniquely Determined by Their Composition Factors, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 6(2), 1990, pp. 97-99
It is proved that the modules in any component of the AR quiver of a wild hereditary Artin al gebra are uniquely determined by their composition factors.