Geodesic
On Pleasant Eulerian posets
Discussiones Mathematicae. General Algebra and Applications, Tome 43 (2023) no. 1, pp. 161-171.

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In this paper, we classify Eulerian posets of small rank which are pleasant and further show that there is no pleasant Eulerian poset of rank less than are equal to 7.
Keywords: posets, lattices, Eulerian lattices, pleasant poset 
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Subbarayan, R.; Vethamanickam, A.; Amirtha, V. Gladys Mano. On Pleasant Eulerian posets. Discussiones Mathematicae. General Algebra and Applications, Tome 43 (2023) no. 1, pp. 161-171. http://geodesic.mathdoc.fr/item/DMGAA_2023_43_1_a14/

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