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Weight posets associated with gradings of simple Lie algebras,Weyl groups,and arrangements of hyperplanes |
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| Authors: | Dmitri I. Panyushev |
| Affiliation: | 1.Institute of Mathematics,VAST,Hanoi,Viet Nam |
| Abstract: | We graph-theoretically characterize triangle-free Gorenstein graphs G. As an application, we classify when (I(G)^2) is Cohen–Macaulay. |
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