Sydney University Algebra Seminar

    University of Sydney

    School of Mathematics and Statistics

    Algebra Seminar

    Katarina Blagoveshchenskaya
    St. Petersburg Technological Institute

    Direct Decompositions of Torsion - Free Abelian Groups.

    Friday 12th November, 12-1pm, Carslaw 375.

    It is well-known, 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.