no. 6
A balanced non-partitionable Cohen–Macaulay complex
Juhnke-Kubitzke, Martina1 ; Venturello, Lorenzo1
1 Universität Osnabrück Institut für Mathematik Albrechtstraße 28a 49076 Osnabrück, Germany
Algebraic Combinatorics, Tome 2 (2019) no. 6, pp. 1149-1157.

In a recent article, Duval, Goeckner, Klivans and Martin disproved the longstanding conjecture by Stanley, that every Cohen–Macaulay simplicial complex is partitionable. We construct counterexamples to this conjecture that are even balanced, i.e. their underlying graph has a minimal coloring. This answers a question by Duval et al. in the negative.

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DOI : 10.5802/alco.78
Classification : 05E45, 13F55
Mots clés : simplicial complex, balancedness, Cohen–Macaulay, partitionability
Juhnke-Kubitzke, Martina 1 ; Venturello, Lorenzo 1

1 Universität Osnabrück Institut für Mathematik Albrechtstraße 28a 49076 Osnabrück, Germany 
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Juhnke-Kubitzke, Martina; Venturello, Lorenzo. A balanced non-partitionable Cohen–Macaulay complex. Algebraic Combinatorics, Tome 2 (2019) no. 6, pp. 1149-1157. doi : 10.5802/alco.78. http://www.numdam.org/articles/10.5802/alco.78/

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