On the Ranks of Certain Semigroups of Orientation Preserving Transformations |
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Authors: | Ping Zhao |
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Affiliation: | 1. Mathematics Teaching and Research Section , Guiyang Medical College , GuiZhou, Guiyang, China zhaoping731108@hotmail.com |
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Abstract: | We classify the unmixed squarefree lexsegment ideals and determine those which are Cohen–Macaulay. |
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Keywords: | Idempotent rank Order preserving transformation Orientation preserving transformation |
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