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On Representations of Graphs of Type A

J. Chislenko and C. Kenneth Fan
Proceedings: Mathematical and Physical Sciences
Vol. 439, No. 1907 (Dec. 8, 1992), pp. 687-690
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/52193
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
On Representations of Graphs of Type A
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Abstract

We investigate the number of orbits in a variety Λ V associated to Dynkin graphs of type An as defined by G. Lusztig. For n < 4, we show that there is only a finite number of indecomposable representations in Λ V up to isomorphism. This implies that Λ V consists of finitely many orbits for any V. For each n > 4, we show that there exist V for which Λ V contains infinitely many orbits.

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