Degenerations in the module varieties of almost cyclic coherent Auslander–Reiten components

Volume 114 / 2009

Piotr Malicki Colloquium Mathematicum 114 (2009), 253-276 MSC: 14L30, 16G10, 16G70. DOI: 10.4064/cm114-2-8


We establish when the partial orders $\leq_{\rm ext}$ and $\leq_{\rm deg }$ coincide for all modules of the same dimension from the additive category of a generalized standard almost cyclic coherent component of the Auslander–Reiten quiver of a finite-dimensional algebra.


  • Piotr MalickiFaculty of Mathematics and Computer Science
    Nicolaus Copernicus University
    Chopina 12/18
    87-100 Toruń, Poland

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