
School of Mathematics and Statistics
Katarina Blagoveshchenskaya
St. Petersburg Technological Institute
Direct Decompositions of Torsion  Free Abelian Groups.
Friday 12th November, 121pm, Carslaw 375.
It is wellknown, that two decompositions into direct sum of
indecomposable summands of an arbitrary torsion  free abelian
group are not isomorphic in general (in the sense of Krull 
Schmidt). The number of summands in a decomposition and their
ranks are determined completely by a new graphical method.
